/usr/share/perl5/PostScript/File/Metrics/std/ is in libpostscript-file-perl 2.20+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/PostScript/File/Metrics/std/Courier/
/usr/share/perl5/PostScript/File/Metrics/std/Courier.pm
/usr/share/perl5/PostScript/File/Metrics/std/Courier/Bold.pm
/usr/share/perl5/PostScript/File/Metrics/std/Courier/BoldOblique.pm
/usr/share/perl5/PostScript/File/Metrics/std/Courier/Oblique.pm
/usr/share/perl5/PostScript/File/Metrics/std/Helvetica/
/usr/share/perl5/PostScript/File/Metrics/std/Helvetica.pm
/usr/share/perl5/PostScript/File/Metrics/std/Helvetica/Bold.pm
/usr/share/perl5/PostScript/File/Metrics/std/Helvetica/BoldOblique.pm
/usr/share/perl5/PostScript/File/Metrics/std/Helvetica/Oblique.pm
/usr/share/perl5/PostScript/File/Metrics/std/Times/
/usr/share/perl5/PostScript/File/Metrics/std/Times/Bold.pm
/usr/share/perl5/PostScript/File/Metrics/std/Times/BoldItalic.pm
/usr/share/perl5/PostScript/File/Metrics/std/Times/Italic.pm
/usr/share/perl5/PostScript/File/Metrics/std/Times/Roman.pm