Shadow problem at export in PDF

[Anamaria24533823y27u]

Hello

I made this logo with white stroke and shadow, but when I export in PDF it looks weird, with some grey spots. I can't figure out why.

Thank you for the help.

1. How it is in Illustrator

2. How it looks in PDF

[Kurt Gold]

Can you share both the .ai file and the .pdf file?

Also, what application are you using to view the .pdf file?

[Anamaria24533823y27u]

Sure. I attached both. On my PC in Acrobat DC, it looks fine, but when I open in browser or on my phone, it's looks with those errors. Also, I send the PDF to the other 2 persons and it looks the same.

[Anamaria24533823y27u]

Here is .ai file

https://drive.google.com/file/d/1IXRxJhdSxvO6fk4J7USjl5SmLRmAGJPi/view?usp=sharing

[Kurt Gold · Accepted solution]

Thanks for the sample files.

The entire construction is a bit convoluted and obviously some PDF viewers take the group with the 103 pt white stroke and the white filled objects as if it was outlined. Therefore the grey snippets appear which are actually part of the drop shadow effect.

If you modify the appearance stack a bit, it should work with other PDF viewers as well.

See this sample .ai and .pdf file:

Master Kids modified

[Anamaria24533823y27u]

Many many thanks. I understand now.