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Forensic check

HTPBE_COLLAPSED_TO_RASTER

HTPBE_COLLAPSED_TO_RASTER appears on 0.4% of modified results in our corpus. A marker is evidence about the file, not a judgement about the person who sent it.

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Marker profile

Image Forensics

Document content converted to images after creation.

Share of modified results
0.4%
Frequency rank
#34
Among the 56 markers seen in modified results
Certain confidence
0%
Of results with this marker rated certain rather than high
Fires alone
67.6%
Results where it is the only marker found

Marker profile

What HTPBE_COLLAPSED_TO_RASTER tells you

HTPBE_COLLAPSED_TO_RASTER is one of the named findings returned in modification_markers when a PDF is reported as modified. It belongs to the Image Forensics group of checks. These checks look at embedded images and scan-like pages for editing, re-saving or a capture origin that does not hold up.

On 67.6% of the modified results that carry HTPBE_COLLAPSED_TO_RASTER it is the only marker. A result with this marker carries 1.3 markers on average. It is most often found together with HTPBE_TOOL_VS_STRUCTURE_MISMATCH, on 27.0% of these results.

Example API response

How it appears in a result

When a PDF is reported as modified, HTPBE_COLLAPSED_TO_RASTER is listed in modification_markers next to the verdict and its confidence. Each marker is a named, actionable finding – not a score.

GET /api/v1/result/{id}
{
  "id": "9f3a2c1d-8b47-4e6f-a012-3d5e7f890123",
  "status": "modified",
  "modification_confidence": "high",
  "modification_markers": [
    "HTPBE_COLLAPSED_TO_RASTER"
  ],
  "creator": "Adobe Acrobat Pro DC",
  "has_incremental_updates": true,
  "page_count": 3
}

Full schema in the API reference →

Distributions

What ships alongside HTPBE_COLLAPSED_TO_RASTER

The tools, formats and document traits that appear on the modified results carrying this marker. Shares are of those results.

Common Producers

Microsoft Print to PDF writes 62.2% of these results – and 21.9% of all modified results naming it carry this marker.

Microsoft Print to PDF21.9% of its modified62.2%
PDFlib21.6% of its modified29.7%

Common Creators

VCTransaction is the Creator on 27.0% of these results.

VCTransaction40.0% of its modified27.0%

Often found together with

HTPBE_TOOL_VS_STRUCTURE_MISMATCH sits next to HTPBE_COLLAPSED_TO_RASTER more often than any other marker.

Document origin

Consumer software59.5%
Scanned37.8%

Creator → Producer pairs

VCTransaction → PDFlib27.0%

Detected origin software

Microsoft Print to PDF59.5%

Confidence of the verdict

High86.5%

When these results were checked

March 202613.5%
April 202618.9%
June 202613.5%
July 202616.2%
August 20268.1%
September 202613.5%
October 202613.5%
November 20262.7%

Document length

2–5 pages62.2%
6–20 pages24.3%

File size

100 KB – 1 MB45.9%
1 – 5 MB48.6%
Over 5 MB5.4%

PDF versions

PDF 1.786.5%

Year the document says it was created

202313.5%
202429.7%
202651.4%

Long tail

Notable observations

Smaller cuts of the results carrying HTPBE_COLLAPSED_TO_RASTER – useful context, but treat each row as a single data point rather than a strong signal.

Digitally signed
0%

Of files carry at least one digital signature

Saved revisions
0%

Of files contain earlier saved revisions

Embedded JavaScript
0%

Of files contain JavaScript code

Embedded files
0%

Of files have attachments inside

Avg pages per document
3.9
Markers per result
1.3

Average number of markers on these results

Related checks

Other Image Forensics checks

Checks from the same group. Each card links to its own reference page.

HTPBE_IMAGE_EDITED_AND_RESAVEDEmbedded image showing signs of having been edited and re-saved
Share of modified0.3%
HTPBE_PHYSICAL_SCAN_GEOMETRYA page captured from a physical copy rather than the original file
Share of modified5.4%
HTPBE_FAKE_SCANNER_ORIGINA scan origin that does not hold up
Share of modified0.8%
HTPBE_RENDERED_PSEUDO_SCANScan-like pages with signs of software rendering
Share of modified2.3%

FAQ

HTPBE_COLLAPSED_TO_RASTER: common questions

What does HTPBE_COLLAPSED_TO_RASTER mean?

HTPBE_COLLAPSED_TO_RASTER is a named finding in an HTPBE? result: document content converted to images after creation. It is returned in the modification_markers list of a modified result and belongs to the Image Forensics group of checks.

Does HTPBE_COLLAPSED_TO_RASTER mean the document is fake?

No. A marker is evidence about the file, not a judgement about the person who sent it. It records that the file shows this pattern; it does not say why, and it does not assess what the document states. Read it together with the verdict and any other markers on the same result.

What should I do when a result contains HTPBE_COLLAPSED_TO_RASTER?

Ask the sender for the original file straight from the issuing system, or request a fresh copy from the issuer. Check whether the document went through a later step such as re-saving, merging or converting, and verify it with the issuer before relying on it for a decision.

How common is HTPBE_COLLAPSED_TO_RASTER?

HTPBE_COLLAPSED_TO_RASTER appears on 0.4% of the modified results in the HTPBE? corpus. The corpus consists of PDFs people chose to submit for checking, so it skews towards documents someone had a reason to doubt and is not a sample of all PDFs.

Where do I see HTPBE_COLLAPSED_TO_RASTER?

In the modification_markers list of the result returned by the HTPBE? API, and on the result page of a modified document. Other checks in the Image Forensics group are listed below on this page; all 63 checks are listed on the how-it-works page.

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