How to Sign a PDF on an iPad

1) Please download Adobe Acrobat DC, you can use the following link.
2)Select the tools option.

3)Select the Signature Option.

4)Select where you would like the signature. It can be changed later.
5)Select Add Signature. 

These steps will allow you to draw your signature and place it where you like in the document. You will be able to select thickness of ink and color afterwards.