You cannot download the official TTF/OTF files legally for commercial use unless you are a Samsung partner. However, you can enable it on any Samsung device by navigating to: Settings > Display > Font size and style > Samsung Imagination (or SamsungOne).
Micro-rounded transitions at outer apex points soften the text blocks, preventing reading fatigue during long screen sessions. Samsung Imagination Modern Font
It is not the most beautiful font in the world, but it might be the most functional font for the modern, imaginative mind. You cannot download the official TTF/OTF files legally