From d6337ee3a2c5103e1c96642792c95ac33b336b9f Mon Sep 17 00:00:00 2001
From: Matthew Laukala <mlaukala@feichtnerdatagroup.com>
Date: Tue, 14 Nov 2017 10:10:51 -0800
Subject: [PATCH] IsValidXref() no will no longer check if it's inside of a
 stream beyong an EOF symbol.

---
 src/PdfSharp/Pdf.IO/Parser.cs | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/PdfSharp/Pdf.IO/Parser.cs b/src/PdfSharp/Pdf.IO/Parser.cs
index bd21277b..95a9b11e 100644
--- a/src/PdfSharp/Pdf.IO/Parser.cs
+++ b/src/PdfSharp/Pdf.IO/Parser.cs
@@ -1088,17 +1088,21 @@ private bool IsValidXref()
 				content += _lexer.ReadRawString(content_pos, read_length);
 
 				int ss = content.IndexOf("stream", StringComparison.Ordinal);
+				int eof = content.IndexOf("%%EOF", StringComparison.Ordinal);
 				int es = content.IndexOf("endstream", StringComparison.Ordinal);
 
-				if (ss < es)
-				{
-					// Not inside of stream
-					break;
-				}
-				else if (es != -1 && ss > es)
+				int s = Math.Min(ss, eof);
+
+				if (s != es)
 				{
-					// inside of stream
-					return false;
+					if (s == -1)
+						return false;
+					else if (es == -1)
+						break;
+					else if (s < es)
+						break;
+					else if (s > es)
+						return false;
 				}
 
 				content_pos = content_pos + read_length;