Pictures are NOT CLEAR after exporting to PDF.

[Crazyluo]

It's blurry while pictuer exported into PDF.

[Ares Hovhannesyan]

What type of picture? Can you share them here for testing?

[Crazyluo]

They're .png pictures exported from Axure，which 375pixel wide.  But it got much more blurry while exported into PDF,meanwhile the PDF can be large（50MB，5MB compressed via other tool）.

[Ares Hovhannesyan]

IMO the reason can be the resolution of image which can be small. When XD exported pdf it can make image larger size and that can make image blurry.Try to increas resolution of image before exporting pdf.