PSPDFKit appears on both legitimate first-generation output and downstream re-save flows — context (the other tool on the same document) is what flips the signal.
Back to all statisticsForensic verdictBased on 5 appearances across the HTPBE? corpus.
Corpus profile
PSPDFKit (now Nutrient) is a commercial PDF SDK embedded in mobile and desktop apps for viewing, annotating, and saving PDFs. Its presence as Producer means the document passed through a PSPDFKit-powered application save.
PSPDFKit appears in mobile app save flows and document-management products. The signal is contextual — when PSPDFKit is the latest Producer on a document whose Creator was an institutional generator, that producer/creator mismatch indicates the document was opened and re-saved by an end-user app, which is what we surface.
Role in the workflow
Every PDF carries a Creator (the application that produced the original document) and a Producer (the engine that wrote the PDF). The same tool can appear in either slot, with very different modification profiles.
Distributions
The PDF versions PSPDFKit writes when acting as Producer, and the other tools that appear in the same documents.
Most output is PDF 1.7 (50% of files where PSPDFKit is the Producer).
Expert PDF 15 sits upstream in 40% of cases — read this row as “what kinds of documents end up routed through PSPDFKit.”
Related profiles
Other tools that frequently share metadata with PSPDFKit in the same documents. Each card links to its own forensic profile.
Long tail
Smaller cuts of the PSPDFKit corpus — useful context, but treat each row as a single data point rather than a strong signal.
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