Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae16fb6e390ca29…

MALICIOUS

PDF

49.1 KB Created: 2020-10-27 21:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: ea0df26d83486891cca5d961f9195295 SHA-1: aff5e1f27a8518689c430b5b8c75ca234c44fed0 SHA-256: cae16fb6e390ca29d156abc62147575353dbf80dec4c959798a07f7c40bda09e
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.me/123?keyword=what+are+his+implicit+costs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f914ec98bc62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f891dc890ed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_5f8ae8c9b9e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f89e5bc94b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5f8bf4c2a68c3.pdfIn PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/suluvijovuvavew.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/japifoluwesu-putajadu.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/108da588d8fe70.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/2d1905abc62e2a6.pdfIn PDF document text
    • https://gebedevalofibut.weebly.com/uploads/1/3/4/3/134379687/riviwirivovu-nadugaluk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f93ec1c950ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f884b1480452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f88ca1fdd4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8870f5a7822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f8d841de109c.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://uploads.strikinglycdn.com/files/16415a26-3745-4140-a315-83ea7fe1df63/39001748487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c191be4-6466-4933-b9f8-793cbfc8c9f1/13108464222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af98daff-3c7f-4138-9877-6fb5f0b6370c/biguwifajuzetakivabezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8481dd26-6b83-4290-8b65-2ccb091e4296/bidipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f808d955-eab1-47b8-a90b-e8ca51127559/walking_out_by_david_quammen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb45f400-6f5f-4e96-a758-198f02f2eba4/dice_masters_civil_war_playmat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd06d7bd-c217-4a20-af21-0abbe0b0ba93/gezujijonanagin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/8582/9541/files/30337328249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7642/7197/files/jeduxepisa.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_off000072a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A9 4868 bytes
SHA-256: c75730ab6ac993c35ae1d7d76f65c63477da8571f89388d69bb3b7d88bdd1b6c
font_01_sfnt_off00008339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 11096 bytes
SHA-256: 21e04470cd4ec6ce1c1977518856ce07e77c17c3a45cf95c73d02e7270294181
font_02_sfnt_off0000a810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA810 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176