A vulnerability in Adobe Acrobat 9 allow attackers to cause the program to crash by providing it with a malformed URL, the following exploit can be used to test your system for the mentioned vulnerability.
Exploit:
<!-- Jeremy Brown (0xjbrown41@gmail.com/jbrownsec.blogspot.com)
Adobe Acrobat 9 Remote DoS (--) Tested on AA9/IE7/Vista
I can't seem to reproduce this on XP! Oh well.
Of course the most popular app for reading pdfs is SfS/SfI :)
Basically it will crash with any uri that adobe doesn't like.
Also interesting: try with file:///DoS and look in bottom left area -->