/usr/lib/x86_64-linux-gnu/libshadowsocks-libev.so.2 is in libshadowsocks-libev2 3.1.3+ds-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libshadowsocks-libev.so.2.0.0