Malicious PDF — malware analysis report

Static analysis result for SHA-256 a188a6e9f65ead06…

MALICIOUS

PDF

39.5 KB Created: 2020-10-28 23:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1f94937715678862584d93643555637f SHA-1: d63a0d5cc88bdf46e2ec7324befb81a7902b9863 SHA-256: a188a6e9f65ead06be2894981b788279a6c8fb11d78c54a10981566aaa696cbc
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services, suggesting a link farm or SEO poisoning tactic. One prominent link, 'https://cctraff.ru/strik?keyword=maytag+quiet+series+300+parts', is identified as a malicious redirector. The document's structure and the presence of numerous links indicate an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=maytag+quiet+series+300+parts In PDF document text
    • https://forunevelaviwa.weebly.com/uploads/1/3/4/3/134392474/59e49e8cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f8a1387d24a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f910292cc9b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8763e998396.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/gipesi_pujivasa_kodezawesukovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f8ceb4c74311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f93ff6068445.pdfIn PDF document text
    • https://jederatikepu.weebly.com/uploads/1/3/4/3/134370591/kijurazagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f8c7dcc40414.pdfIn PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/lenoxadapekowap_ruzolosiputize_bixefig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f95ea1dc1982.pdfIn PDF document text
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/kavagos-dosofos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5f95493b48c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8755ed440d1.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/1/0437/8381/5325/files/fiputisukewewiguvis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8250/6930/files/lulubox_ff_skin_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e695c186-e40a-49a9-b02c-479e602c3735/65907620831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/51649384742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbb0f72-dcd7-45a2-8500-5e37c80de599/tifibekamefus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1518/3777/files/android_pie_multitasking_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/insinkerator_65_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e063dd42-6afe-45cb-99cc-c8c7e3ba6e79/tirinhas_com_oraes_subordinadas_ad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3432/8219/files/35246280244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e6fb1f-94ec-45de-9d00-28810c616373/gogelimabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104823b9-85b6-48b4-8ae5-52989ecc4daa/97790071727.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_off00005942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5942 5492 bytes
SHA-256: 42c4360e09fa4a2fe1cc3b2b1bbf720ac1b204d77ec177bdd087c2ece98a0cdd
font_01_sfnt_off00006c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C14 10624 bytes
SHA-256: 1e6a076ce6f3a39e4d22cd73cb387840693e6b8875f78342dcc871e88180900e

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