Here You have almost a perfect train. Why almost — because the train Redsky, not BONDS. Russian conductors are afraid of auditors, and take not very happy.
Run around the cars, if you can find Armenian or Georgian — most likely it will be easier to pass.
Can try with a passenger.
Even with a passenger plane — "cling" better to the queue for registration. Come and ask, not whether such flight You. The price tag is the same. Sometimes even cheaper. Often the good women free took the envelope (documents, etc) — say that Your cousin left without tickets and money, and You urgently need to send her the papers, etc.
Your situation is complicated only by the Urals. From Moscow no problem would be, because there are trains TIES.