Modifications ,cracks etc are all classified as viruses for most of the shitty antiviruses and firewalls. dont worry about it. And its not 2005 anymore, you really dont need any of those antivirus firewall bs. Just get Adblock and everything will be fine
But, last link is good/virus-free
But i give you other link :D
www.mfrserver.com/up/Graffiti SawnOff by Petrova[RsT].rar