/usr/lib/x86_64-linux-gnu/libcanberra-gtk3.so is in libcanberra-gtk3-dev 0.30-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcanberra-gtk3.so.0.1.9
/usr/lib/x86_64-linux-gnu/libcanberra-gtk3.so.0.1.9