Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec4c88279ddafc7…

MALICIOUS

PDF

57.5 KB Created: 2020-11-13 10:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d52ac0eacd98e589411f6b53228aea45 SHA-1: c009e9b11b36793c45db0ace9ded1b99477aff1a SHA-256: cec4c88279ddafc745ece5539ee434d9f8348c247a3cfb2b6e12551f2da983d7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also flagged it with high confidence. The embedded URL points to 'traffmen.ru', which is identified as malicious. This suggests the PDF's primary purpose is to lure users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=www.moviesmobile.net+bollywood+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f978d26dc54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_5fa5387005a9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23613b28-5593-4a01-a04d-7237d8a2ddbd/taditatiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d593cd-7f11-4444-86c5-844f34d52f2e/side_by_side_english_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d0eada-8665-4b21-9a0a-75fdcf8ffbd5/73991731389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75350b6f-0c61-409f-8b5a-057ea6bd754b/xtc_dear_god_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3191d603-901b-43c3-8204-d72546ecdd51/wixavenodonimojekifapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c212aa26-cfe7-4564-bcf0-a8a98f88c745/jovozifozegit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23bb1fb8-3ca8-4b24-b0cb-93bb4d0de06a/71471855104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9861d30-6287-4833-ad45-07ae58dd2c23/jimexisisejijisokolosibol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b6aa72-550b-45a6-9f59-57f5f61b494a/libro_teoria_de_juegos_gibbons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540f17a7-a8fa-46b6-a446-f294dbbdefcc/48354582900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d4f268-3362-4960-b843-ced60f8e8c06/78249404502.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA971 5584 bytes
SHA-256: 26506e55f3a76dbe136171b7161c9eddedbb9ce5278c237ec5708398121209ec
font_01_sfnt_off0000bc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC84 8428 bytes
SHA-256: 3faaceb0c9ee681190cccc21632ff4b445c964b2f3abad3785e8b2f59b470005

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