Thanks, Shnoulle!
I have try to use it. Really, the top of PDF files now in cyrillic! It's cool!
But the characters in string "Быстрая статистика" ("Quick statistics") in the top
and in the headers of tables are allocated is too close to each other:
It doesn't looks fine.
And the second problem from that issue isn't solved: there are question marks in Mac OS and empty squares in Win instead the spaces before and after the strings still in menu of PDF viewer.
Limesurvey inserts this spaces automatically when admin places cursor to the "Question" field writing the text of the question.