12 - Awesomeness - 200 pts

Description
Category: forensics

We found this weird text file on one of AED machines.
It contains some repeated characters, but we can't figure out what it is.

Please examine and get us anything that's useful! (well, get the key)

Download
http://www.plaidctf.com/chals/d8acfb840311d442b9ddc6b1e5e32e313ebb5328.tgz

Update:
BTW, this was found on Windows machine.