/usr/share/myspell/dicts/hyph_ru_RU.dic is in openoffice.org-hyphenation 0.6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/myspell/dicts/../../hyphen/hyph_ru_RU.dic
/usr/share/myspell/dicts/../../hyphen/hyph_ru_RU.dic