It's an arrow pointing straight up and angled to the right. The direction that could also be used to describe this arrow is much like you would see if looking at a compass and it pointed to a north east direction.
This is a Up Right icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.