FP or not, the message “processing abort connection” means that malware tried to connect but connection was aborted (by you), so you were not infected.
To make sure you could download F-prot for Dos from: http://www.claymania.com/f-prot.html , and scan.
But I assume that RejZoR is right, and this is a False Positive. I had a similar thing lately also for a dinosaur DOS virus, see: http://forum.avast.com/index.php?topic=27574.0
Update, downloaded the .swf file and uploaded it to VirusTotal, scan in progress now and so fare only avast has detected it as infected. VT just failed at 23 scanners an only avast detected it, I will upload again and see if it completes, but it looks certain it is an FP, I have submitted it to avast.
As a temporary measure, you could add the path you posted to the Web Shield, Customize, Exceptions, Add. This will exclude the file from scans.