Selenium PDF Parser - selenium-webdriver

Question

In my application I will land in one page there will be a text in there and I have to open a PDF in the same page and compare the text in the PDF and the main page matches.
I am using pdfbox -1.8.15
But when I run the below code getting this exception:
Exception in thread "main" java.io.IOException:
Error: End-of-File, expected line at
org.apache.pdfbox.pdfparser.BaseParser.readLine(BaseParser.java:1523) at
org.apache.pdfbox.pdfparser.PDFParser.parseHeader(PDFParser.java:372) at
org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:186) at
TestCases.lastpdf.main(lastpdf.java:83)
driver.findElement(By.xpath("//*[#id=\"ctl00_cph_main_rg_QiSummaries_ctl00__0\"]/td[2]/img")).click();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
String winHandleBefore = driver.getWindowHandle();
for(String winHandle : driver.getWindowHandles()){
//Switch to child window
driver.switchTo().window(winHandle);
}
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
URL url = new URL(driver.getCurrentUrl());
System.out.println(url);
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
String mypdftxt;
BufferedInputStream fileToParse = new BufferedInputStream(url.openStream());
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
PDFParser parser = new PDFParser(fileToParse);
parser.parse(); // exception occurs here
mypdftxt = new PDFTextStripper().getText(parser.getPDDocument());
System.out.println(mypdftxt);