Malicious PDF — malware analysis report

Static analysis result for SHA-256 995b69fbec0133ce…

MALICIOUS

PDF

43.3 KB Created: 2020-10-27 08:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 99e3c48ce584b4aa88a649793d70cd32 SHA-1: 0c71f0de29e19ed114254cda0f4c680ee956225c SHA-256: 995b69fbec0133ce6d709b9f171c106252f724ed045f487538126e445f9af139
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=stardew+valley+maple+syrup+not+working In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f88ba2ead8f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f9147d57797b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f944938ac745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5f95353b5e696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5f96058facab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f95e5ea4f78e.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/3672124.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/jefolizebumikik-zidenuzaz-tonofuwizakufu.pdfIn PDF document text
    • https://suvejuxib.weebly.com/uploads/1/3/4/3/134380783/6d8d3a7b.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/1/0433/7162/6659/files/vuwebajike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3222/6203/files/waguwefikojiluzadesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4027/2284/files/read_to_self_anchor_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9692/3040/files/personality_and_individual_differences_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/pezuwufatis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8566/0828/files/comment_apprendre_larabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2722/5506/files/rixaranepulibetakobakuf.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_off000066cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CF 5700 bytes
SHA-256: e892f94060d7daff54dc76454b92ae412080147abc8989c5dda8cf515b3282b5
font_01_sfnt_off00007a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A40 11624 bytes
SHA-256: 567fe2fc0f403d03444fc382611b79da15a87b0c1f11785f290cad374014b3e2

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