The iframe is pointing to hxxp://auto-stats.info/eng/in.cgi?2 ; a domain that was created just a week ago.
It looks like the domain is already unreachable. Maybe the company hosting auto-stats.info has already pulled the plug on whatever was lurking behind that link.
Since the iframe tag has dimensions of width=0 height=0 border=0 , my guess is that there was a malicious PDF hiding in there