diff --git a/pdf.c b/pdf.c
index c1652fb3cecf649ef9f0fb67ec86c3f24c612e00..04e077d7770c356c450863f0601ea7238b17d119 100644
--- a/pdf.c
+++ b/pdf.c
@@ -4374,8 +4374,8 @@ process_page_content(struct Env *aux)
 	// XXX validate the presence of this field elsewhere
 	tok = dictentry(trailer, "Size");
 	if (tok == NULL || tok->token_type != TT_SINT) {
-		log_message(5, "VIOLATION[5]: error parsing trailer section!"
-		    "Missing or malformed /Size field.\n");
+		log_message(5, "%s: missing or malformed /Size in trailer\n",
+		    aux->infile);
 		return;
 	}
 	Size = H_CAST_SINT(tok);
@@ -4968,7 +4968,7 @@ parse_xrefs(const uint8_t *input, size_t sz, size_t *nxrefs)
 			break;
 	}
 	if (res == NULL) {
-		log_message(5, "VIOLATION[5]: startxref not found\n");
+		log_message(5, "%s: startxref not found\n", infile);
 		goto end;
 	}
 	offset = H_INDEX_UINT(res->ast, 0);
@@ -4979,8 +4979,8 @@ parse_xrefs(const uint8_t *input, size_t sz, size_t *nxrefs)
 	// verify the offset recovered is bounded to be in the file
 	// XXX this check is already present below by virtue of h_seek()
 	if (offset > sz) {
-		log_message(5, "VIOLATION[5]: startxref at %zu (%#zx) points outside the file\n",
-				sz - i, sz - i);
+		log_message(5, "%s: startxref value at %zu (%#zx) points "
+		    "outside the file\n", sz - i, sz - i);
 		goto end;
 	}
 
@@ -4989,8 +4989,8 @@ parse_xrefs(const uint8_t *input, size_t sz, size_t *nxrefs)
 		assert(offset <= sz);
 		res = h_parse(p_xref, input + offset, sz - offset);
 		if (res == NULL || res->ast == NULL || H_INDEX_TOKEN(res->ast, 0) == NULL) {
-			log_message(5, "VIOLATION[5]: error parsing xref section at "
-			    "position %zu (%#zx)\n", offset, offset);
+			log_message(5, "%s: error parsing xref section at "
+			    "position %zu (%#zx)\n", infile, offset, offset);
 			break;
 		}