If not try
Sophos for home use
or Clam XAV also free from App store
and do a scan
How can I remove this http://i.trkjmp.com/click malware from my Macbook Pro?
It's adware, which is not always considered to be malware, so most A-V software won't find it. It almost certainly is a chrome extension / plug-in you have installed as a toolbar, coupon printer, codec, etc. If "save as" wasn't it, then start disabling them one at a time until it stops.
Thanks, everybody. I went to my Google Chrome extensions and removed one called "fast save" (not quite "save as," but similar). This was probably the problem. Pennbank, thank you for the article and the anti-virus ware. I'm going to see if I notice any change during the next week or two before I decide to install and run it though.