Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb6866efe426798…

MALICIOUS

PDF

40.0 KB Created: 2020-11-06 03:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6cdc6274605ef6740d7c8f12b4a2d51d SHA-1: 183859e68053cc1b945b42f52935b35771043ccb SHA-256: 9bb6866efe4267987cfa2d1f1cc4cb92d909cad57d78d1083aa8f8fbdd94b92f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=stele+of+hammurabi+art In PDF document text
    • https://zizavoxepob.weebly.com/uploads/1/3/4/4/134479394/8956793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f98132f8e8db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_5fa08f33df44d.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/1/0504/5475/7575/files/vakejudajizadodazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8563d9e-97d5-4ac6-8275-82f33c756606/58364820946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c970f29-237d-4a2f-8b85-512da69461e4/46813951919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ea9d0d-1f53-49a1-a085-876e02e61666/rugifulavajekojupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7331db2-08d1-471f-a786-03f9ef8f2d65/plot_diagram_worksheet_with_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1087/3273/files/f1_2020_ers_manual_or_auto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7996821-7e56-42cd-8f34-f61d089c7675/robokojugevumuxunijapi.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_off00005ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE2 5072 bytes
SHA-256: 9d71bf146f46edc52655eef346c1c9cbaf55f1bad21f8747abd08960c04ed9ab
font_01_sfnt_off00006ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 10832 bytes
SHA-256: 9f80a34803d1030b3579171d818b05d6c2d4272b99e4d24b07395d671175e8a6

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