/usr/bin/ttf2kotexfont is in texlive-lang-korean 2015.20160223-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../share/texlive/texmf-dist/scripts/kotex-utils/ttf2kotexfont.pl
/usr/bin/../share/texlive/texmf-dist/scripts/kotex-utils/ttf2kotexfont.pl