In this case it's just down to the styling added in the WYSIWYG editor for the link to the file.

You can remove the styling (so as to return to the default) by loading the page in the editor, selecting the bit that you want de-styling, then clicking the 'eraser' icon - this is roughly in the middle in the third row of icons.

As an aside, I'd probably recommend using the Our Files app to upload minutes and agendas - you can create folders and add files in here, without having to then edit links on pages.

Thanks

Joe