/usr/lib/libmrpt-obs.so.0.9 is in libmrpt-obs0.9 1:0.9.5svn2717-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libmrpt-obs.so.0.9.5
/usr/lib/libmrpt-obs.so.0.9.5