If you want the full version and license for commercial use,
you can purchase here :
https://displaytypefont.com/product/mattilda/
File Font Version :
1. Mattilda.otf
2. Mattilda.ttf
3. Mattilda.woff
4. Mattilda Italic.otf
5. Mattilda Italic.ttf
6. Mattilda Italic.woff