Malicious PDF — malware analysis report

Static analysis result for SHA-256 c872cb116bfd1a3c…

MALICIOUS

PDF

40.8 KB Created: 2020-10-20 15:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 703209d59c240b0bac5854d8c7503641 SHA-1: d1621872963ca62319acd0c39ca655ce23c962a1 SHA-256: c872cb116bfd1a3cc76ca0534502b110db6e54915129821e2717425c7907c55b
184 Risk Score

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://ttraff.link/pify?keyword=gunsmith+part+8+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f8b7323aa38f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8936b883e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8769d6d0865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f8dd59907870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8d0e1ce5f67.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/xufotikaravomi.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/kitaxikorox-rosopazefezu-popiz.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/30bfad0a6af73ae.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/efb45fb9b.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/todoluranefix.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/xenisiro_muvup.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/3045490.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/xuweroz-zodazof.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/4d81b8c52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5f8b3083d2f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f8ca5dd4146e.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/1/0497/8045/7623/files/92099899230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/22104895645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/zereneweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4018/4232/files/xikuwazupaxutukabup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0964c1-2ff0-48a0-924f-54861996cde2/66555972850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de268a5-d96f-4ea2-b1b7-114b21574515/74700082585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04e40e9-33b8-4349-b7ea-cfc00b3e537e/anna_karenina_sch.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_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 5564 bytes
SHA-256: 475aab9c3b23b3082d64c678e909d42b9b8fa37b2bc6a7c11432969c97524a5f
font_01_sfnt_off0000733a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x733A 10104 bytes
SHA-256: 8540d65a373b968807d3fd8268b883fa0eeb7dde396e65638f246d2daf6de778