Malicious PDF — malware analysis report

Static analysis result for SHA-256 1905de5b0b48d5e0…

MALICIOUS

PDF

39.1 KB Created: 2020-11-05 09:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 270c3e63fd84c568b4b9b590f0b84514 SHA-1: 05c69e752c2ee1f707fe538ab6b71bab3a57036d SHA-256: 1905de5b0b48d5e05bf459920871db7c23492948b62a9b13e59a4f573c7e454a
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=the+very+lonely+firefly In PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/2391b09.pdfIn PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/divazajanetire.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/kakuxipilivebajazol.pdfIn PDF document text
    • https://wofexexugov.weebly.com/uploads/1/3/4/3/134318452/8968077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f91847b25c82.pdfIn PDF document text
    • https://xavupavise.weebly.com/uploads/1/3/4/5/134584264/nebijugifo-tizika-guxusisulavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8ae75b3dd76.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/dezitozomejugipadipe.pdfIn PDF document text
    • https://mugekezozo.weebly.com/uploads/1/3/1/6/131636766/vipobovalujete.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/603727af-5f3e-423c-984d-6c1b26f4d422/xetoduruxusawur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e93bd69-8ce7-4108-9cae-0c08edd51c4e/64124005479.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_off00005adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADC 4580 bytes
SHA-256: d63b40717b293a7b2a157566fea8a4a40273188217e70815567190bf9cabb94b
font_01_sfnt_off00006a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A75 11344 bytes
SHA-256: e1e15e811e9491d0eaadc3b04f39e02766c72a713b454e1c0c5518d49ae25f75

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