CSAW Reverse Engineering Challenge by Alexander Sotirov

Instructions:

1) Install AdbeRdr910_bg_BG.msi. This is a slighly modified
   version of Adobe Reader with some extra functionality.

2) Open CSAW.pdf and follow the instructions in it. If you
   enter the right key in the form, Adobe Reader will pop
   up a message box to congratulate you.

Your goal is to find the modifications in Adobe Reader and
find the key that brings up the message box.