How to use this project?

VisualStudio Code + Docker (Recommended)

The easiest way to use this project is by opening this repo with VSCode and Docker.

Go to Extension by pressing ctrl+shift+x and search for Remote - Containers ms-vscode-remote.remote-containers. Install this extension. In the bottom left, you can click to reopen in container

If you are asked for a Python interpreter, choose python 3.8.

Please Note: If you are on Linux and use the flatpak version of VSCode, you are probably not having docker. See visualstudio.com for other installation methods.

Ubuntu/Debian

In addition to Python 3 (3.8 recommended), you need pip for installing requirements.txt. The following additional packages are necessary:

apt-get install ghostscript libmagick++-6.q16-dev swig

Since imagemagic does not allow to convert a pdf to a png, you need to adjust the policy.xml as follows:

# Debian fix for imagemagick
# https://stackoverflow.com/questions/52998331/imagemagick-security-policy-pdf-blocking-conversion
sed -i '/disable ghostscript format types/,+6d' /etc/ImageMagick-6/policy.xml

How to create attacks?

Each attack is located in a subfolder of the shadow-attack directory. You will find three subdirectories:

hide
replace
hide-and-replace

Each folder has one or more variants of the respective attack class.

You can simply open the contained *.ipynb Jupyter notebook and follow the instructions contained therein. Sometimes, VSCode does not show any content on the file. Please close and reopen the file in this case.

What is in the other directories?

resources

This directory contains ressources that are required for the shadow attacks. These include a pdf signing tools, a demo RSA key, malicious fonts, etc. You must not modify these files.

shadow-demo-exploits

This directory contains sample exploits generated with the scripts in shadow-attacks.

shadow-detector

This script detects malicious pdf files.

jloehel / pdf-attacker