Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0972eda836caab1…

MALICIOUS

PDF

39.1 KB Created: 2020-11-02 21:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6b54c97f44c51fd17646fbaa923a698d SHA-1: 62e0e620263e8195ab15be62f0a363fa43b52a0a SHA-256: e0972eda836caab1b62dfd7da5dae585508d2b4978109e51993a109d05cd9084
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?keyword=craftsman+37595+router+and+router+table+combo'. The document body, though partially corrupted, also contains this URL and other links, suggesting a link farm or SEO poisoning tactic to direct users to malicious sites. No scripts were extracted from this sample.

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://cctraff.ru/strik?keyword=craftsman+37595+router+and+router+table+combo In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/goletudavegiwuluj.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/vewopuvukovus_tidipiwus_kiperoget_movubajumuxijid.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/e3ece647-b374-418a-bab2-4e8718414d87/lakaposemugagisepevev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6af83cd-c0b8-4419-ad60-a2a414fdddb5/1984_unit_plan_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a93543-3634-4568-9ca9-23970d5b6d7b/dagubogagizoguvuwimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2118/8251/files/hp_envy_m7_notebook_battery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0650/7162/files/the_natural_resources.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ac6743-f85c-4309-9904-0c66211c1b18/44812365197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d9f8c9-9240-41df-bf7e-a59be8ff1047/80359419672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a02170-660d-4dc8-8e1c-f0f818cca2fe/64644834158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68358f9f-b77d-4a16-a3d8-bacf511f5a6e/63180827543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/imam_nawawi_40_hadith_malayalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c7053f-5f9e-491e-b659-e760ddfa1995/bezati.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_off00005937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5937 5736 bytes
SHA-256: cb6049c123b9aaa5eee71c32277559214661511fd96dadc22165c4f254611046
font_01_sfnt_off00006cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 10236 bytes
SHA-256: 713924a214ed00a9b1214fa0f4304022a7d624a68b0b7e5be5ef5e615e9fc914

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