Most university libraries subscribe to or ScienceDirect . If you log in via your university proxy, you can view and download chapters of the Netter Atlas legally for free.
: The same content but organized by organ systems (e.g., Nervous System, Cardiovascular System). atlas de anatomia netter pdf
The official digital edition is available on Amazon and Google Play. While it isn't a raw "PDF" (it uses reflowable text or fixed-layout ePub), it is legal, high-resolution, and costs roughly $40–60 USD—a fraction of the print price. Most university libraries subscribe to or ScienceDirect