Repeated "styles" folder in trash
This answer by Matthieu Riegler suggests the following when dealing with a Trash that won't empty (this does not, however, address WHAT the files are or whether they are malicious):



When you have problems to empty the trash, rm -rf ~/.Trash/* in the terminal does the job for you.

You have to keep in mind that there might be multiple .Trash directories. 
For example on a USB stick or a external Drive, OSX will create another .Trash at the root of the drive. So you might need to use  rm -rf /Volumes/DriveName/.Trash.*