A signature revision footer must be the PDF's terminal footer A historical PDF signature is not automatically stale after a later incremental update: its /ByteRange should normally stop at the %%EOF that closed its own revision. But that footer must itself be terminal. A tolerant parser ignorin...
Source: [Dev.to](https://dev.to/sybilgambleyyu/a-signature-revision-footer-must-be-the-pdfs-terminal-footer-554p)