Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a5a230775f8232…

MALICIOUS

PDF

45.9 KB Created: 2020-10-06 13:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b795db682d77b6d1f5ba70666c54912e SHA-1: f3556f2ad451571d0bdeb17eccb00d5d6663c678 SHA-256: e4a5a230775f823217db01932c6a76f2844db10a7d4fe955910ed36b8875204d
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.club/pify?keyword=the+nice+guys+parents+guide In PDF document text
    • http://lixefeb.teresasthriftytreasures.com/uploads/1/3/1/4/131405927/1105c50baab62.pdfIn PDF document text
    • http://files.zubaidafoundation.com/uploads/1/3/2/6/132681396/4260007.pdfIn PDF document text
    • http://files.lslvet.com/uploads/1/3/1/3/131398148/2353530.pdfIn PDF document text
    • https://site-1037905.mozfiles.com/files/1037905/nitalumowigufurov.pdfIn PDF document text
    • https://site-1039274.mozfiles.com/files/1039274/85392857351.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/13391164486.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/kadulumejebebudilikiwupoz.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/24718956057.pdfIn PDF document text
    • http://xavud.timjamesscience.com/uploads/1/3/1/4/131406109/rerabapati_kopapidizupixid_beladit.pdfIn PDF document text
    • http://files.lulabellsconfections.com/uploads/1/3/1/1/131164431/renitinobuti.pdfIn PDF document text
    • http://files.monasedrak.com/uploads/1/3/0/7/130776599/menekugilekazovigu.pdfIn PDF document text
    • http://mosim.relationalintegration.org/uploads/1/3/1/3/131398404/3a2cb4e05f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7640 5352 bytes
SHA-256: 6c6f2a5f43f296d7443ec94f9179497cf863e0f196085dc89d2d43ea7c7fab59
font_01_sfnt_off0000887a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887A 10304 bytes
SHA-256: f99aafa15f9e1fd20307586d9cfc237dcd3986bc4cbbb9bb7324876357fd56f2