Malicious PDF — malware analysis report

Static analysis result for SHA-256 56dc4e0b3b1b0fcf…

MALICIOUS

PDF

41.4 KB Created: 2020-11-01 11:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 53c156bf73acebd7bf07dd27341f9586 SHA-1: 08383fe05c612d19ef846a192ca4e9d2210bc968 SHA-256: 56dc4e0b3b1b0fcfe3aaf935aea2c480f7a033ad133ac5be0a6c2dcf2c5145b8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body and heuristics indicate a lure related to 'roku channels disney', combined with a large number of embedded links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=roku%20channels%20disney In PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/futaxitexazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5f90f64bb9ef2.pdfIn PDF document text
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/a78b86e33ebd295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8b38e1bac9d.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/1/0506/8688/6077/files/57975696914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb41e55-2084-44a8-9f3f-88e384e0e282/78346703119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03335282-1ef6-4736-b337-03ac7185f7f3/jozafufifixapozawiriweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5206a8b5-c03d-4890-92fc-b54275d6c003/14334985782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1138/1672/files/morsani_college_of_medicine_downtown_tampa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e768b75f-ad8c-40c3-b9cd-1da52c58aff0/9493498801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6711ba-9343-4a32-892a-69b3c1888f53/tudexogegix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82b0f96-1aac-4539-86fb-9568fcc1037d/dadofeganimikigusit.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_off00006258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 5104 bytes
SHA-256: af086574c7fada0a1c955816ff3b43d56b83ee39548259db04c288d1dd9c2527
font_01_sfnt_off000073bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BF 10908 bytes
SHA-256: fdb5faf634512ca22145b5b1a01ddacc69956c2762603c167129c35119e14b7e

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