"DM" frequently stands for "Direct Message" or "Digital Media." This archive might contain high-resolution design templates, 3D models, or "Vertigo"-themed visual effects (VFX) used in video editing.
Use The Unarchiver , which is available on the Mac App Store.
While the specific contents depend on where the file was sourced, the name "DMs_Vertigo" often points to one of the following: