Help! Removing static pulsing buzz.

[sashao99604431]

Hello there!
I've been using a new camera, and to my surprise the external microphone picks up an internal 'pulsating' buzz. It buzzes on each second.
I've been trying to remove it in Audition - noise prints, plugins, DeEsser... no luck.
I can see where the buzz occurs - it's quite difficult to see. (images attached!)
Can anyone here advise? I'd really appreciate it! 

[SteveG_AudioMasters_]

Pictures aren't really any good for this - we'd need a sample of the sound - as recorded in its original format.

[sashao99604431]

https://drive.google.com/file/d/1eoVlEOAjrsKhEu4veI2bvKqQjDQJVDEm/view?usp=sharing

[sashao99604431]

Here is the audio file - please feel free to have a play with it!

https://drive.google.com/file/d/1bi4Cb26fQDBqeewlg-yyPYLyUom02Wr5/view?usp=sharing

[sashao99604431]

(I'm also adding a full one in its original format. It's called DSCF0843.)