/usr/lib/mysql-workbench/libmdcanvas.so is in mysql-workbench 6.2.3+dfsg-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/mysql-workbench/libmdcanvas.so.6.2.3
/usr/lib/mysql-workbench/libmdcanvas.so.6.2.3