/usr/lib/x86_64-linux-gnu/libSDL_ttf-2.0.so.0 is in libsdl-ttf2.0-0 2.0.9-1.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libSDL_ttf-2.0.so.0.6.3
/usr/lib/x86_64-linux-gnu/libSDL_ttf-2.0.so.0.6.3