This is a picture of the letters V and K morphed together. They have pointy edges on the letters, and they are pictured alone in the center of a rounded square shape.
This VKontakte icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.