Didier Stevens

Sunday 31 January 2021

New Tool: pdftool.py

Filed under: My Software,PDF — Didier Stevens @ 0:00

pdftool.py is a new tool I developed. This version has only one command: iu (incremental updates).

With this command, one can check if a PDF has incremental updates, and then select different versions of this PDF with incremental updates.

A PDF with incremental updates, is a PDF that has been modified by appending changes to the document at the end of the PDF file, without modifying the original content.

Here is a video explaining incremental updates and the use of my tool.

I reference 2 blog posts in the video: “Solving a Little PDF Puzzle” and “Shoulder Surfing a Malicious PDF Author“.

pdftool_V0_0_1.zip (https)
MD5: ED2BBE886008C737CC06E22F4F0FE8A1
SHA256: 401E88FBFAEC4382A50FE59430D04FE6111F9911958AB09BA7530C26043FDA87

3 Comments »

  1. Amazing! Thanks for implementing the project I’ve been slowly working toward, while learning about PDFs; I’m sure your code will be helpful when I get stuck or am looking for inspiration about how to do more/better.

    Comment by Alex — Sunday 31 January 2021 @ 20:28

  2. Correction for your first sentence: you write “one command: ui” instead of “iu”.
    (Feel free to delete this comment; it doesn’t contribute anything technical.)

    Comment by Alex — Sunday 31 January 2021 @ 20:34

  3. Thanks!

    Comment by Didier Stevens — Sunday 31 January 2021 @ 20:57


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