Voronin signed a year-long loan deal last week but rumours have suggested that Moscow will recall him in the next few days and the player himself has denied these reports.
"I am in Moscow actually," Bild quotes Voronin as saying. "I am here to help my wife Yulia to finalise our move to Dusseldorf.
"I have spoken to the Dynamo manager, of course, but I will definitely be back at Dusseldorf soon."
Voronin scored eight times in 74 caps for Ukraine.