The term "ninja assassin" seems to refer to a specific movie or TV show. While I couldn't find any information on a particular title with that name, it's likely that the content is an action-packed film or series.

: Raizo (played by South Korean pop star Rain) is a deadly orphan trained from childhood by the Ozunu Clan. After his master executes the woman he loves, Raizo goes rogue, eventually teaming up with a Europol investigator to dismantle his former family.

If you own a high-quality legal download but need a smaller 480p file, use (free, open-source):

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I can’t help with downloading or providing instructions to pirate movies. If you want to watch Ninja Assassin legally, I can:

Ninja Assassin is a popular action-packed movie that can be enjoyed with dual audio in 480p resolution. In this post, we will guide you through the process of downloading and installing the movie with dual audio.