Malicious PDF — malware analysis report

Static analysis result for SHA-256 4703bbea5b6ac19f…

MALICIOUS

PDF

56.7 KB Created: 2020-11-03 07:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9b117eebf78c4ec2a3e07bf589856a56 SHA-1: 7576c662f9628df0d45c5f4414ad64316bcd9714 SHA-256: 4703bbea5b6ac19f2613ee26c31e07b023723c367a92471737e8c86bfd522de6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though obfuscated, contains the URL 'https://gettraff.ru/123?keyword=persona+4+jester+social+link+guide' which is flagged as a malicious redirector. This indicates the primary purpose is to drive traffic to malicious sites, likely for further exploitation or phishing.

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://gettraff.ru/123?keyword=persona+4+jester+social+link+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_5fa0c4e94ff5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f889b5dbecb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f99bdf89ce0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f918c1eeefab.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/01e28169-0847-46bc-9e1d-a2798c208047/37813652447.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/cinderella_solution_meal_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0e4f74-0451-4524-a77d-343c557706eb/sakamirupinavepirifel.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/poultry_feed_formulation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8140/8416/files/kigesosofisivakazufumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1137/1703/files/95622375575.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/book_acknowledgement_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6719/8619/files/caderno_de_caligrafia_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/better_self_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/67559200394.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/gulolagaxarovi.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_off00009e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E89 5336 bytes
SHA-256: 3fce92dd666cad12f47b1d0d81c06f2f317ef211d4b21d872873c69a441e0b7f
font_01_sfnt_off0000b0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C9 10872 bytes
SHA-256: 3c3c763f90e8db1cc4ed46ddcb5d800fb9e15cdbe574778f761972ad6c9c5e43

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