It may be the film 'The Flying Saucer' directed by Mikel Conrad. It is set in a Alaska during winter which involves the 'snow-covered landscape' element.
American Intelligence officials learn that Soviet spies have begun exploring a remote region of the Alaskan Territory in search of answers to the worldwide reports of "flying saucers". A wealthy American playboy, Mike Trent (Mikel Conrad), who was raised in that remote region, is recruited by intelligence officer Hank Thorn (Russell Hicks) to assist a Secret Service agent in exploring that area to discover what the Soviets may have found.
To his pleasant surprise, Mike discovers the agent is an attractive woman named Vee Langley (Pat Garrison). They set off together and slowly become mutually attracted to each other. Their cover story is that Mike is suffering from a nervous breakdown and she is his private nurse. At Mike's family's wilderness lodge, they are met by a foreign-accented caretaker named Hans (Hantz von Teuffen), new to the job.