is that some sort of virus and if so how can I get rid of it?
Any help is welcomed...
No. OS x does not get viruses. Hold down the option key while emptying the trash.
According to Apple - http://www.apple.com/why-mac/faq/#viruses Is a Mac safe from PC viruses?
Yes. The OS X operating system isn’t susceptible to the thousands of viruses plaguing Windows-based computers. And although no computer connected to the Internet is completely immune to all viruses and spyware, OS X has built-in defenses designed with your safety in mind. The Mac web browser, Safari, alerts you whenever you’re downloading an application — even if it’s disguised as a picture or movie file. And Apple continually makes free security updates available for Mac owners. You can even have them download automatically.