Malicious PDF — malware analysis report

Static analysis result for SHA-256 b766f33409bf2fe3…

MALICIOUS

PDF

41.9 KB Created: 2020-10-17 00:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0435948da2b6a448cd1f69c80429aeac SHA-1: e98f18e3829518fa81b139c76650ac00778f597b SHA-256: b766f33409bf2fe32e38c29d46443f76f7f5d1110d883286676d73e3948fcc28
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://gettraff.ru/123?keyword=smart+tv+tizen+or+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f88b91912a51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f893ab6c9335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f89c037ad3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f87bf9249594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f8a0b2629316.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/9f62339f4.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/2736734.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/xufawuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8923fbc0b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f8a0c7e13e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f87636a73ffa.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/81e29b51b843.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/263184.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/pudaposir_rezavajazev_kadagubewetake_kewetugo.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/2546310.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/19655fed-9b82-4f2a-bc34-cfa215c15d49/18795626214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81bdefc-4be3-4653-9d4b-d57089e9ac1f/losojuzinijitedenizifuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d268811f-924d-449f-8a14-e67e468440c4/31199456581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036fbb98-ec6d-4810-9097-7f67cfb5cd7b/colace_davis_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21c3b9c-221a-4ed8-a214-6fb6242cf779/coco_full_movie_hd_in_hindi_dubbed_f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed8f47f-3793-44ac-8749-ede47f6bf066/megudom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e81afe-9a33-4a80-9d37-526ea02f115b/67710869282.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_off0000671e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671E 4976 bytes
SHA-256: dbda8e78d9d1ba0f3232ead1c08941107f5d287567fdf1e65aaff3435835a56a
font_01_sfnt_off000077f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 10168 bytes
SHA-256: 4a5a106fa2ac2d069fcc46b0a8cb224ad656ef534763f3a78f3c807a8cf68d03

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