Malicious PDF — malware analysis report

Static analysis result for SHA-256 d905c15cafb8abd7…

MALICIOUS

PDF

41.6 KB Created: 2020-11-02 09:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 86f7573cb758af66533246dcdbd0495d SHA-1: ba85d2fd8c6f005021f99c754e9fe90959572bff SHA-256: d905c15cafb8abd7fd04fef59db32283cde5fdf16c2607c6d476f55090eaacdf
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://gettraff.ru/wb?keyword=card%20stacking%20advertisement, which is highly indicative of a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to lure the user to a malicious site, likely for credential harvesting or further 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://gettraff.ru/wb?keyword=card%20stacking%20advertisement In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5f9253939439f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8fd84540b80.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/ruzuvusumarif.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/nowexonozexel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8ee404bdc13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f93c6322f111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_5f958cd36b875.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/1684707.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/nivatizadukodisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8736bee5644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f97bb1283d38.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/37174b4b-5f63-4050-8812-b7f6fcaf4c5f/vadexezitufidegiliseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e8fdf2-6b09-47b3-bbd9-07ca9dd2672f/megovejerosulawudax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a126095-96c3-46c2-a3ed-b45783fdc150/85526443712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea61d59-b177-4828-a641-09d68378e48f/pupizezidikemivozur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8716843-abe2-49dd-be1c-638abdc1a53d/96398830873.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_off000061a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 5256 bytes
SHA-256: 71a15487511b5150f318c8ee39f5264f73a1bc141dfc29b9846833afd64c573b
font_01_sfnt_off00007379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 11424 bytes
SHA-256: 3f41361eed96f903b05a69612c3ca84065738db89514783b4046255dfbdd7365

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