Text changing when exporting to PDF in Adobe Illustrator

[annem54081904]

Text changing when exporting to PDF from Adobe Illustrator. 

In the file, the text size, weight, font, and color are the same. There is a white background behind the text. 

WHY is it different? It's driving me nuts. 

** And before you come at me, the client first told me they wanted a full color infographic, so that's why I made it in illustrator. As they then explained their design later, it turned out they needed a decorated word document essentially. And I didn't use inDesign because I hate it. FML.

[c.pfaffenbichler]

Can you provide the pdf? 

What were the pdf settings you chose? 

In which application doe you view the pdf? 

[annem54081904]

Hi, yes! PDF attached. 

[annem54081904]

I'm using Adobe Acrobat for opening the file.

[c.pfaffenbichler]

In Acrobat the second page’s text appears slightly broader here. 

It seems the text is not pure black (0/0/0/100) but a 4C black (75/68/67/90).