Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef134b844fc9b9d…

MALICIOUS

PDF

47.5 KB Created: 2020-10-14 20:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e52c1b76366600cc396210490cba22f0 SHA-1: 647114eed0a7e1ad97795c84aa4fd12e6a814e32 SHA-256: 4ef134b844fc9b9dc686645760e0dce5f31c686d0fa31ad053e115aa1d8bcec1
124 Risk Score

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 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://gettraff.ru/123?keyword=como+citar+con+normas+apa+pdf In PDF document text
    • https://site-1044303.mozfiles.com/files/1044303/navezal.pdfIn PDF document text
    • https://site-1039725.mozfiles.com/files/1039725/zimowuvebusikijofajojiki.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/pebajovojibuvevo.pdfIn PDF document text
    • https://site-1042584.mozfiles.com/files/1042584/mebozagazukid.pdfIn PDF document text
    • https://site-1039888.mozfiles.com/files/1039888/88055399501.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/sixukejomiwewanage.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f87176a04390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f86f94b367b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f86f4fa242fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f86f55811991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f871cfd8f9b1.pdfIn PDF document text
    • https://site-1042711.mozfiles.com/files/1042711/totejubuxob.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/83884469868.pdfIn PDF document text
    • https://site-1040898.mozfiles.com/files/1040898/vabiravu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5852/7897/files/south_carolina_dmv_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9688/6440/files/sadavadopug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8610/3207/files/61621641943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc5d3b2-9c60-4c54-bae0-41bb8e623d79/24195145040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1be72b-5b07-4204-ae6b-257d03ae29c6/80650531590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb12745-4f92-4ed8-aa4c-271d2d8e2a8c/29136479404.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 4960 bytes
SHA-256: 5601f98f79eb35217f2c97e3015ba8870f1138eb15dbadcddb8cab0d2312c3ec
font_01_sfnt_off00007c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8D 11136 bytes
SHA-256: b979fb30cc601277fcb70f576a45ba2720e3bd93c3e68d203a75034c4f46a57e
font_02_sfnt_off0000a08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA08F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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