Resize KDP Cover PDF

I already have a fully-approved wrap-around cover saved as a single high-resolution PDF. All bleed, margin, and trim guides in that file are exactly where they need to be; colours, fonts, and layout must stay untouched... (Budget: $25 - $50 USD, Jobs: Adobe Acrobat, Adobe Creative Cloud, Adobe Illustrator, Adobe InDesign, Book Cover Design, Graphic Design, Illustrator, PDF, Photoshop, Print Design)