diff --git a/src/main/java/org/verapdf/pd/PDAnnotation.java b/src/main/java/org/verapdf/pd/PDAnnotation.java
index c372715d..6a112b16 100644
--- a/src/main/java/org/verapdf/pd/PDAnnotation.java
+++ b/src/main/java/org/verapdf/pd/PDAnnotation.java
@@ -285,7 +285,8 @@ public PD3DStream get3DD() {
     public static Boolean isOutsideCropBox(PDPage page, PDAnnotation annotation) {
         double[] cropBox = page.getCropBox();
         double[] rectangle = annotation.getRect();
-        if (rectangle != null && rectangle.length >= 4) {
+        if (rectangle != null && rectangle.length >= 4
+                && cropBox != null && cropBox.length >= 4) {
             return cropBox[1] >= rectangle[3] || cropBox[0] >= rectangle[2]
                     || cropBox[3] <= rectangle[1] || cropBox[2] <= rectangle[0];
         }
diff --git a/src/main/java/org/verapdf/pd/PDPage.java b/src/main/java/org/verapdf/pd/PDPage.java
index dc946149..dc9940f4 100644
--- a/src/main/java/org/verapdf/pd/PDPage.java
+++ b/src/main/java/org/verapdf/pd/PDPage.java
@@ -148,6 +148,12 @@ public double[] getArtBox() {
     private double[] clipToMediaBox(double[] box) {
         double[] res = new double[4];
         double[] mediaBox = getMediaBox();
+        if (mediaBox == null) {
+            return box;
+        }
+        if (box == null) {
+            return mediaBox;
+        }
         res[0] = Math.max(box[0], mediaBox[0]);
         res[1] = Math.max(box[1], mediaBox[1]);
         res[2] = Math.min(box[2], mediaBox[2]);