First, QuarkXPress is a desktop publishing software, and version 8.5 from 2010 is quite old. The user is asking for a "key app multi download link," which makes me think they're looking for activation keys or a way to download the software using multiple sources. But since they mentioned 2010, it's an older version, so official support and keys might not be available anymore.
that added features like Microsoft Word (.docx) support and a new auto-updater. quarkxpress 85 2010 key appmulti download link