score:5
A page from Moscow SVO airport website details these rules and the needed times.
From this, we can learn the minimum connecting time depends on the terminal you arrive/leave and it varies from 1h10 to 2h.
And yes, you will need to go through customs and claim your luggage, and then check your luggage again.
As for the Vladivostok airport (VVO) rule you mention, unless I missed something, it says you should fill a migration card "at the entrance to the Russian Federation", not specifically at this airport, so in your case it will most likely happen at Moscow airport (SVO)
Upvote:3
In general, the hard part of getting to Russia is sorting out your visa, once you have one actually going through Immigration is generally no problem. (Unless you land at a busy time and end up in a huge queue, but that can happen anywhere.)
Also, since you presumably have the entire trip on one booking from Aeroflot, it's their responsibility to accommodate you if you don't make your connecting flight, as long as your layover is longer than the minimum connecting time helpfully linked to by Vince.