So yeah… The header is messed-up. It actually has the text “WAVEJUNK” where it’s supposed to say “WAVEfmt”. I didn’t look any further but that’s clearly a problem.
If you care… The WAV header is supposed to be the 1st 44 bytes. WAV file format
I used a Hex Editor (XVI32) to look at the file. A hex editor allows you to look at the bytes in any file in hexadecimal. And any hex value that converts to a text character will be shown as text. The hex editor doesn’t know if it’s supposed to be text or not. If you look at the audio data some of the hex values will be shown as text even though it’s really just a byte in an audio sample value.
Following the header there are thousands of zeros which is silence. At 44.1kHz, 16-bit, stereo there are 176K bytes per second, and your file has about 1/4 of a second of silence at the beginning.