Sigcheck
publisher................: PC MEGA RAPIDO LTDA
product..................: ASSISTENTE DE DOWNLOAD
internal name............: ASSISTENTE DE DOWNLOAD
copyright................: (c) PC MEGA RAPIDO LTDA
original name............: pcmegarapido.exe
signing date.............: 6:51 AM 12/22/2011
signers..................: YBR INTERNET LTDA ME
Go Daddy Secure Certification Authority
Go Daddy Class 2 Certification Authority
file version.............: 1.0.0
description..............: ASSISTENTE DE DOWNLOAD
upload to Avira and see what they say
and you posted wrong ThreatExpert link