SampleFont.ttf is DejaVu Sans, from the DejaVu fonts project (https://dejavu-fonts.github.io/).

DejaVu fonts are based on Bitstream Vera fonts (Copyright (c) 2003 Bitstream, Inc.) with additional
glyphs in the public domain. The Bitstream Vera / DejaVu license permits free use, copying, and
redistribution, including bundling with software. See the DejaVu project for the full license text.
