Based on my current information, there is no public record or specific data regarding a file named "."

If you are looking for information on this specific file, could you tell me or what you expect the archive to contain?

The name appears to be a randomly generated string typically used by anonymous file-hosting services or private automated systems. Because it is a .7z file, it is a compressed archive created with software, but without further context, its contents remain unknown and could potentially be unsafe.