The expression can be traced back to horse racing in the 1700s when goats were used to settle the horses. A young goat. An idiom is a turn of phrase that doesn't make sense when literally translated.
Description: GTF file is a General Feature Format File. The Gene transfer format (GTF) is a file format used to hold information about gene structure. It is a tab-delimited text format based on the general feature format (GFF), but contains some additional conventions specific to gene information.
autorun.inf is a file that contains the information of the auto-executable file when a particular drive is opened. Information contains the path of the executable file and the default icon of the drive. This is used for autorunning the cd-rom or dvd-roms. It is not a virus.