Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66c018bd889995d…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 11:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd073a34454fa45cfcc34984c6312a67 SHA-1: 2cfda4ee04ddbd23d2189e36d6365557b3da17c0 SHA-256: d66c018bd889995d78097e3d89c57dd8ef50c140a5e6af68e8d27c2033f5194e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a redirector to a malicious URL, disguised as an annual report. The ML classifier strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.com/pify?keyword=baillie+gifford+japan+trust+annual+report, which likely serves as a lure to further malicious content or phishing pages. Numerous other PDF links are present, many hosted on Shopify, which are likely part of a link farm to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.com/pify?keyword=baillie+gifford+japan+trust+annual+report
    • http://files.carolinasiscebs.com/uploads/1/3/2/6/132683154/9971840.pdf
    • http://regigiru.martypurdy.com/uploads/1/3/1/3/131384516/rixetibukozolipu.pdf
    • http://files.barbaraesanderson.com/uploads/1/3/1/8/131871477/605b8e9.pdf
    • http://files.cosmicbabies.org/uploads/1/3/1/4/131455283/jogafinosivo_vitil_foxewevi_dujupufoxabodos.pdf
    • http://files.mrchunsclass.com/uploads/1/3/1/3/131398367/joludime_baboxuwugodad_xutewisu_vujad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/26496187659.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/completing_the_square_worksheet_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/9963429197.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/play_script_template_pages.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/98643441867.pdf
    • https://cdn.shopify.com/s/files/1/0433/9036/9942/files/bike_games_free_apps.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/eritema_toxico_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/lojijawakugaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/lesasilawagisefesiwowan.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/30502212654.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef3.bin
322e2e52b972e452712a21b5c2ef5e3d773fafa51e0ce77a3c8038492b0ba700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 5332 bytes
font_01_sfnt_off0000812e.bin
c16f57ff732b293bf00045a51b08ff5781d70e36795c145577aa4c480f8ae5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 10108 bytes

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