The bubble atop of the forward fuselage looks exactly like the one the Russians invented to serve as an additional tank for their Tupolev 154 Hydrogen-powered jet studies.
This was necessary to accommodate the liquid hydrogen, and lateron there have been efforts of Airbus and Tupolev together to build a testbed. There has been a Tu 216 flying allegedly, maybe this is a derivative of an A300 with one engine running on liquid hdrogen.
by the way, the color scheme of the airplane on the picture is very much like the old aeroflot scheme.