diff --git a/src/core/font_substitutions.js b/src/core/font_substitutions.js
index 41bc5cc75fbb1..1e87fabac5a3a 100644
--- a/src/core/font_substitutions.js
+++ b/src/core/font_substitutions.js
@@ -51,6 +51,7 @@ const substitutionMap = new Map([
         "FreeSerif",
         "Linux Libertine O",
         "Libertinus Serif",
+        "PT Astra Serif",
         "DejaVu Serif",
         "Bitstream Vera Serif",
         "Ubuntu",
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index 75b11be7dc1a2..d56b98224fac8 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -752,3 +752,4 @@
 !bug1937438_af_from_latex.pdf
 !bug1937438_from_word.pdf
 !bug1937438_mml_from_latex.pdf
+!pt-astra-serif.pdf
diff --git a/test/pdfs/pt-astra-serif.pdf b/test/pdfs/pt-astra-serif.pdf
new file mode 100644
index 0000000000000..6b79a887e50ff
Binary files /dev/null and b/test/pdfs/pt-astra-serif.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 03d1f1d71b4fe..19225f307de62 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -13049,5 +13049,12 @@
         "rotation": 0
       }
     }
+  },
+  {
+    "id": "pt-astra-serif",
+    "file": "pdfs/pt-astra-serif.pdf",
+    "md5": "9fde8eb426f74e5a8a4fcb7b3bfbe397",
+    "rounds": 1,
+    "type": "eq"
   }
 ]