koeiekat said 
As Menhir already wrote 3 years ago, a font file can not contain a virus as a font file is a passive file.
A virus can only activate itself when included in an executable (exe) file.
https://security.stackexchange.com/questions/123131/how-to-detect-suspicious-content-in-a-truetype-font-ttf-font-file
TTF format includes executable "hinting" code. <sarcasm>Of course! Microsoft invented the format.</sarcasm>
Simply displaying the font executes the code. You could strip all the hinting code - but then it would likely not be any good.
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