/usr/lib/liblttoolbox3-3.1.so.0 is in liblttoolbox3-3.1-0 3.1.0-1.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/liblttoolbox3-3.1.so.0.0.0
/usr/lib/liblttoolbox3-3.1.so.0.0.0