27C3 - Version 1.6.3

27th Chaos Communication Congress
We come in peace

Julia Wolf
Day Day 4 - 2010-12-30
Room Saal 1
Start time 11:30
Duration 01:00
ID 4221
Event type Lecture
Track Hacking
Language used for presentation English


What you didn't know about Acrobat

Ambiguities in the PDF specification means that no two PDF parsers will see a file in the same way. This leads to many opportunities for exploit obfuscation.

PDFs are currently the greatest vector for drive-by (malware installing) attacks and targeted attacks on business and government. A/V technology is extraordinarily poor at detecting these. The PDF format itself is so diverse and vague, that an A/V would need to be 100% bug-compatible with the parser in the vulnerable PDF reader.

You can also do cool tricks like make a single PDF file that displays completely differently in several different readers.