Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d95e544ab982434…

MALICIOUS

PDF

41.9 KB Created: 2020-11-05 20:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bd6cc788973530e60ce1f351ef2ef040 SHA-1: 3b48df8021b1736e561a8ed7e5d3d424c3703b18 SHA-256: 4d95e544ab9824343d7221bec2856fdd4f98c43218a751d8c939c114aa3ba98b
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'traffking.ru', suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure indicate an attempt to redirect users to potentially malicious content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?keyword=scottish+basket+hilt+broadsword+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f991ac2c973d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f97c71a7ee63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f9464a628738.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/fenevizunuxe_debajogot_fuvibuf_xufibevugivega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5fa305a0997e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nagavuwofapan/zogizulelekevivapafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5529a2-4f36-4d8b-8c73-a9b6d2071acc/mupupuvinupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6d205e-e101-49e3-8f6d-67209630d1d6/nanubefekilaxotomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223a2b53-3f2d-403d-a949-bc220d527cc5/71850323467.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/bodurudinidomil.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_off00006400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6400 5508 bytes
SHA-256: 9cad7c3ad25b6f5af9da2d25d89fbab54e21a7ccc5bc587a747f3da7f799e03d
font_01_sfnt_off000076c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C8 10668 bytes
SHA-256: 1caa61d3c4cd688c95a28d49fe37bb5029929e00f40622bce156ad28609dac24