Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ef0881bb1bfe8f…

MALICIOUS

PDF

477.2 KB Created: 2020-10-07 20:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f42924d767e77edd4acb5d643ee2c892 SHA-1: cdb4825118ebc9464a95d522b9212f93e03bce4e SHA-256: 69ef0881bb1bfe8fa88defe078d07ea99698ccb065bd374afbd26ea7947e5485
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=2000+kanji+x%25E1%25BA%25BFp+theo+v%25E1%25BA%25A7n+pdf'. This URL is likely used to lure the user to a malicious site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=2000+kanji+x%25E1%25BA%25BFp+theo+v%25E1%25BA%25A7n+pdf In PDF document text
    • https://site-1039661.mozfiles.com/files/1039661/57821599762.pdfIn PDF document text
    • https://site-1038553.mozfiles.com/files/1038553/jadelawasijonoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1896/3109/files/lodozepujexutisim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/4-5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0053/1613/files/pufawunedegowujal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6310/5953/files/aub_and_anb_probability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0927/1702/files/c2bfcuc3a1les_son_las_pruebas_estadisticas_parametricas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409c632b-6c4a-4d03-be45-afe472b1e18b/35575311197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7f6290-e108-4de2-8bd2-5bf522e12a79/9455805205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6558cc7-fd8c-472a-a447-72da72ad9c64/68657277069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4665ab9-1fc1-4920-abdb-ff1c4af59606/1922764086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54935123-d45c-4fab-8f1a-9c7626db7b9f/gugunogasuwijufojina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3969b3-1497-4cc1-b1c0-58a6799bba7d/menobobonatanotasevewigax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd46bc4-c7d7-487c-9161-72cec2eb870f/pavutegomilexaxum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303f90a8-7da1-40f8-abf6-0800b10f636f/74994960325.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017f6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17F6C 507540 bytes
SHA-256: 376caed25d96ca42e127ad9c88263cd0d2cd45b5d9aeff27aed0fbf03b1a738e
font_01_sfnt_off00071c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9A 5700 bytes
SHA-256: 1222239a868d8a9427fd4efc38891945e2374aae8bff92439294efad183c609a
font_02_sfnt_off00072f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F40 21816 bytes
SHA-256: 475c71febacf0266ccfd93bcaf5b2de692c170e3ac37cb10ba872ec4fe2b67d8

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