Once and for all:
IT IS IMPOSSIBLE TO PUT A VIRUS IN A SRT. Well, not exactly impossible. You could do it but since srt files are not executable it would be harmless. The most harmful thing I can think of is displaying strange characters.
Please, DIY: open a subtitle file with the notepad or whatever text editor you like. How the hell can you hide a virus (or make it execute) there?
This is nonsense.