Thanks everyone for your suggestions.
How I knew I was infected, I just was running my systems monitor which I do from time to time and I noticed a file that had this name/number attached and it said it was for a pC-based mac which made it stand out. I typed the name of the file into google and it led me here where it confirmed my suspicion it was malware.
After I downloaded the free program from Apple web site, I could never get it to open successfully. I got an error code which I talked with Apple about and they said based on the code there was something wrong with the file and that they would get hold of the 3rd party publisher. In the meantime they suggested I drag it to the trash and I did and have kept an eye open for it to reappear but it hasn't so hopefully its gone.
That is what my instincts told me to do to begin with but I wanted to be sure I shouldn't do more and thats why I left my posts here and why I called Apple since I'm not up to speed on the current philosophy regarding macs and malware.
But thanks for your suggestions and interests. you have a cool/helpful website here, very impressive, thanks. I told my friends about you.