Forensic check
HTPBE_
An implausible chain of production software. A marker is evidence about the file, not a judgement about the person who sent it.
Back to all checksMarker profileGenerator Fingerprinting
An implausible chain of production software.
Independent signals
1
Check group
Generator Fingerprinting
19 checks in this group
1
Conditions this check evaluates
Returned in
modification_markers
Field of a modified result
Marker profile
What HTPBE_IMPOSSIBLE_TOOL_PIPELINE tells you
HTPBE_IMPOSSIBLE_TOOL_PIPELINE is one of the named findings returned in modification_markers when a PDF is reported as modified. It belongs to the Generator Fingerprinting group of checks. These checks compare the software a file claims to come from with what the file itself shows about how it was produced.
Example API response
How it appears in a result
When a PDF is reported as modified, HTPBE_IMPOSSIBLE_TOOL_PIPELINE 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_IMPOSSIBLE_TOOL_PIPELINE"
],
"creator": "Adobe Acrobat Pro DC",
"has_incremental_updates": true,
"page_count": 3
}Full schema in the API reference →
Related checks
Other Generator Fingerprinting checks
Checks from the same group. Each card links to its own reference page.
HTPBE_TOOL_VS_STRUCTURE_MISMATCHStructural evidence that contradicts the file’s stated originShare of modified14.8%
HTPBE_FONT_VS_TOOL_MISMATCHFont handling that points to a different producerShare of modified0.1%
HTPBE_RESIDUAL_PRIOR_GENERATOREvidence of an earlier production history behind the current fileShare of modified0.4%
HTPBE_EDITING_TOOL_FINGERPRINTFingerprints of PDF editing softwareShare of modified5.2%
HTPBE_DOCUMENT_RESTAMPED_AFTER_CREATIONDocument re-saved by another tool after its original creationShare of modified0.1%
HTPBE_ONLINE_EDITOR_ORIGINSigns of processing by an online PDF editing or conversion serviceShare of modified2.2%
HTPBE_SELECTIVE_IDENTITY_EDITOrigin information partly removed or editedShare of modified0.3%
HTPBE_IDENTITY_OVERWRITTENOrigin information replaced with that of different softwareShare of modified0.1%
HTPBE_UNKNOWN_IDENTITY_CLAIMMetadata showing signs of having been rewrittenShare of modified1.5%
HTPBE_SCRIPTING_ON_REEMITTEDActive scripting added to the document after its original creationShare of modified<0.1%
HTPBE_LAYERED_IDENTITY_DISAGREEMENTClaims about the producing software that do not hold upShare of modified0.5%
HTPBE_IDENTITY_BLANKEDIdentifying details stripped from the document after productionShare of modified14.5%
HTPBE_DESIGN_TEMPLATE_ASSEMBLYPage content composed from separately produced partsShare of modified16.5%
HTPBE_ALTERED_TYPEFACE_IDENTITYA font whose identity appears alteredHTPBE_TOOLCHAIN_DEFAULT_METADATA_RESIDUETraces of other software in the document’s productionHTPBE_PRINT_PIPELINE_TAMPERINGSigns of alteration in a document that was re-printed to PDFHTPBE_FONT_LAYER_INCONSISTENT_WITH_ISSUERTypography indicating the document was not produced by its stated issuerShare of modified0.1%
HTPBE_PRODUCER_IDENTITY_FORGEDFabricated origin details that misstate how the document was producedShare of modified0.1%
FAQ
HTPBE_IMPOSSIBLE_TOOL_PIPELINE: common questions
What does HTPBE_IMPOSSIBLE_TOOL_PIPELINE mean?
HTPBE_IMPOSSIBLE_TOOL_PIPELINE is a named finding in an HTPBE? result: an implausible chain of production software. It is returned in the modification_markers list of a modified result and belongs to the Generator Fingerprinting group of checks.
Does HTPBE_IMPOSSIBLE_TOOL_PIPELINE 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_IMPOSSIBLE_TOOL_PIPELINE?
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.
Where do I see HTPBE_IMPOSSIBLE_TOOL_PIPELINE?
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 Generator Fingerprinting group are listed below on this page; all 63 checks are listed on the how-it-works page.
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