The AIFF file contains a few seconds of sound in German saying 'Dummer Sack', literally 'stupid bag', a not to plesant term to call other people in German.
Step-by-step with actual search result:
1. http://www.apple.com/de/ 2. http://www.apple.com/de/search/?q=AGB§ion=global&geo=de
FORMgⁿAIFFCOMM3á FORMgⁿAIFFCOMM3á@. ¼DINST< O0@╒SSNDgH■╓ à≡φ└δ«εL≤╩⌠1±ê≡╩⌠C∙f²≡{ueù ... http://www.apple.com/de/pro/profiles/otto/images/dummasackloop.aiff