Malicious PDF — malware analysis report

Static analysis result for SHA-256 896db008e7f8a36d…

MALICIOUS

PDF

88.7 KB Created: 2020-10-04 10:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad08ac0d6cc03cab5fb4f0e7ac4cf10e SHA-1: 345d21c2ece36c4b36167e784db9adaba2e4a0a6 SHA-256: 896db008e7f8a36d0de7195f2753fb9ebb16c0f769852b4b23dd2092c3e0d4c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that lead to a redirector, which is a common tactic for distributing malware or phishing pages. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector.

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://ggtraff.ru/strik?keyword=ridgid+shop+vac+wd09450+manual In PDF document text
    • http://tovav.phyllisparun.com/uploads/1/3/2/7/132710621/841ae8abb9.pdfIn PDF document text
    • http://files.easternsloperanch.com/uploads/1/3/2/6/132681404/3588728.pdfIn PDF document text
    • http://files.kitchenideascookshop.co.uk/uploads/1/3/0/7/130739456/6861555.pdfIn PDF document text
    • http://gujedem.toddspianoservice.com/uploads/1/3/1/1/131164250/zovilos-lajebapiro-forewusifiwofa.pdfIn PDF document text
    • http://nedizuvo.tlghk.org/uploads/1/3/1/4/131453494/564ff5eefef15.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/54b45a1a-932b-4fff-b5a7-a6cb1bf9a45f/davedanuratewoxajamekiren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be43fb1-a5ed-4bc9-bb99-98b3e34048d7/73934315497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75bb208-642e-49ed-93fa-953fe500f7f5/mamesutemajamovamabalaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62453b2d-76fa-4699-90b4-74b71f7f0a8d/93752595569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97992b84-80db-4b88-8b1a-2bd28b519bfb/79755583478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d489192-240d-42bc-b18a-8d947124e74c/39856953681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a15521b-777b-4b36-acfa-1baad842c5a1/zoraruvimilajuvukogax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd6d3b1-2df5-4397-a663-c272ab723d3a/pelubagatewedumewogad.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_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 6060 bytes
SHA-256: 1490c1d0e256ac484d7943d89cfa2ce30ee7e4ec7cc6a38079e578acb8d89342
font_01_sfnt_off000130b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B0 11092 bytes
SHA-256: 6cf363b8ccbee0bb3a75e64db828ec6a059bcfa513db518c1dff4b0b96d81378

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