Malicious PDF — malware analysis report

Static analysis result for SHA-256 579a539ecaa6c61a…

MALICIOUS

PDF

41.9 KB Created: 2020-10-27 06:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 3f1e4536f464882e7d703f7c3d82e903 SHA-1: 598f342fac251b4f479918521ec1aeaf0dad0706 SHA-256: 579a539ecaa6c61a2b97027f4c11b96ef961f29a25d352fefddca805f32853ab
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=tera+crafting+guide+2017 In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/wifuruzebafelosadibe.pdfIn PDF document text
    • https://fozijiruzixusap.weebly.com/uploads/1/3/4/3/134317533/kujaparuju.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/pepezubavonateji.pdfIn PDF document text
    • https://nupariredarig.weebly.com/uploads/1/3/4/3/134357859/bb32a47c3dae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f91327bad948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f970a276d4e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f9076c6a2584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f920ee4a5069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f93ed8888398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f8e1c70975c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8897489deea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f94ec50a1775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5f95ae3e69309.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/7005980.pdfIn PDF document text
    • https://ditutemisa.weebly.com/uploads/1/3/4/3/134381329/jotogiburekojupiwoti.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/66e0f14173b0df.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/gubikagov.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000660e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000660e.bin)
    • https://s3.amazonaws.com/bizamesuwepe/37208953812.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 extracted file (font_00_sfnt_off0000660e.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000660e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 5336 bytes
SHA-256: 132266401f9a1843512b6a7c07c7db7345f29e803fc78ec7e230d5fb871c9981
font_01_sfnt_off0000784a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784A 9996 bytes
SHA-256: 6b8eeb4610c9917fb3a82a4672b8bae94c7caf0f96ee16d1c5e750a4e620b114

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