/usr/lib/x86_64-linux-gnu/libfdt.so.1 is in libfdt1 1.4.0+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfdt-1.4.0.so
/usr/lib/x86_64-linux-gnu/libfdt-1.4.0.so