Malicious PDF — malware analysis report

Static analysis result for SHA-256 3198aba7166796e9…

MALICIOUS

PDF

34.4 KB Created: 2020-11-02 23:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8b1d70b97461a790518506668ee1fb10 SHA-1: 850185909e35725eb8faa0840965ba639602234d SHA-256: 3198aba7166796e97a51db67a94ec1ab3eb85560d4ae0b69dde6f33de9b00565
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/123?keyword=dig+dug+trophy+guide'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a potentially harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/123?keyword=dig+dug+trophy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f9a2586a5d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8aab1520c4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8a963f8edff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f8a274e36c53.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/76e77314-55fa-455e-acf6-f8107e8c01dd/82519902783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6259/8067/files/teknik_budidaya_kelapa_sawit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5589/2630/files/live_net_tv_apk_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f10bb7-7025-4c8a-a603-79e1bb3dc317/lexuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a3cc85-6e78-412a-bc89-532c82afa1d5/vevusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0679/4138/files/71276875766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04245b5c-448b-4819-88b4-d50b30de9293/zapubivuvijewipufidize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af497df-af39-41e1-a65b-5fd81a3a57ae/72779961130.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_off00004a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4F 4904 bytes
SHA-256: c12b9a5be7213fb767842f5dbd936ea1338ba9e3a83cff97de3e81491444ff68
font_01_sfnt_off00005b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B09 9984 bytes
SHA-256: abcb20a0b03b2c503d8168dffa93c2d9b16db5a54519da634b61153d8ada9f44