Distracting Blow is an attack, and will not interrupt or provide adrenaline if you miss or it is blocked. It also triggers normal attack triggers, like Order of Pain. However, due to the nature of the skill, it does not trigger Dark Fury.
Like any other attack skill, Distracting Blow has a chance to perform a critical hit even though no damage is dealt.
Distracting Blows caused by Scythes will also interrupt up to 3 adjacent foes.
This has good synergy with Hexes such as Frustration, which cause damage on interrupt.