Hyperdiction
Hyperdiction is when an Unknown Ship interdicts another ship while traveling through hyperspace. The ship gets pulled out of hyperspace into a system and is temporarily disabled. This occurs in a higher-dimensional region in which travel between star systems is possible at superluminal speeds (many times the speed of light).
It has happened around Pleiades and near the Maia system. This doesn't require an unknown artifact in your cargo hold.
Humans only have technology to interdict ships during supercruise in a system.