When importing the PDF the color becomes negative.

[luhciano]

I'm trying to import a PDF into Illustrator, but when I open it the color is negative as in the example:

and when you open the PDF without using Illustrator, it opens normally.

Would anyone know how to fix it?

[Monika Gause]

The PDF has not been created in Illustrator?

Illustrator is not a general purpose PDF editor.

[Mohammad.Harb]

Once you open the pdf file, select all elements then go to Edit -> edit colors-> invert