Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5e4c7783a4882e…

MALICIOUS

PDF

38.2 KB Created: 2020-10-29 04:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b6047e40376e3035b7da7bd0ecd7aef4 SHA-1: f8c8b4da10255d05b70d12a8a510befb566287c7 SHA-256: ef5e4c7783a4882ea14fc6bff6b7722d3b5cc702a3f3b747899395364ecf0ec4
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary URL, 'https://cctraff.ru/pify?keyword=wordly+wise+book+5+lesson+1+test', is flagged as malicious. The document body, though heavily obfuscated, also contains URLs pointing to Weebly and other hosting services, suggesting a coordinated effort to distribute malicious content or engage in SEO spam. No scripts were extracted, but the extensive link embedding strongly indicates a malicious intent to redirect users to harmful sites.

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/pify?keyword=wordly+wise+book+5+lesson+1+test In PDF document text
    • https://sepubipig.weebly.com/uploads/1/3/4/4/134445985/foxivedir-mezawomuseziv.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/rewixe_bisibi_wanajegobu_doxadagonedopo.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/pusonux.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/3082234.pdfIn PDF document text
    • https://xedexebil.weebly.com/uploads/1/3/4/2/134235570/temaseduraxuvog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f945e1792318.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/povakokuxefos.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/232f5246726a.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/lezofixogal_papevinedofera.pdfIn PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/632c6.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/zumifoxenifu-ganamodegunebo-tusekib.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/wevevafilawom.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/7625803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f8842200d9f2.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/a8e0f0d3-a7ba-4026-bb34-a965ca6fe2a6/tipos_de_textos_juridicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/91146113723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3084/6881/files/11176209677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5930/9475/files/97615554446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5f1629-7957-4fe6-ae44-95b4079a619b/bujav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3095/7208/files/97_camaro_ss_wheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b58ff8-236f-4dff-afec-b7b530f3d148/fallout_4_amoral_combat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/87330221521.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_off000057e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E8 5196 bytes
SHA-256: f3f2c33caf860a555e8e05264c2aff5fef219eef280d89589d7228504b405564
font_01_sfnt_off000069cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 9744 bytes
SHA-256: d03321d8b53ef15336a97262ed3029b4b7050d1f65f412725f1b74f676f734bf

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