How to read a table from pdf, where the pdf table contents are dynamic?

I have tried using scrape relative, get OCR text activity for this pdf.Current Requirments 16-8-18.pdf (261.0 KB).But next time i read a pdf file the content are
Current Requirements 11-9-18.pdf (273.8 KB). Now the earlier screen scrape is not working for the second row and third row. How can i read all the data in the table?