Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8a9027a94ca341…

MALICIOUS

PDF

53.7 KB Created: 2020-10-02 05:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d6e41817338a6c2fee13d8b49de5ec59 SHA-1: ea39e610d4edcfa80c098955a0ab07f7c53f4d0b SHA-256: 2a8a9027a94ca3416c7090b9388ef8a306e336f2433484b0b6ad85cf08ddbe16
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=cataclysm+guide+wow In PDF document text
    • http://files.royal-obrienclan-uk.org/uploads/1/3/2/6/132696414/dujilenexipodu.pdfIn PDF document text
    • http://nexel.sankeycomputers.com/uploads/1/3/0/8/130814295/7360677.pdfIn PDF document text
    • http://files.sttammanywoodworkersguild.com/uploads/1/3/1/4/131406344/bf192d3dd3b.pdfIn PDF document text
    • http://files.bridportfolkfestival.com/uploads/1/3/1/4/131436967/gurirefovonenobojeda.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/48905736952.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/redujegukirisosegalenoj.pdfIn PDF document text
    • https://site-1039132.mozfiles.com/files/1039132/50256275486.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/nesunikelezujiloz.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/vagudow.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/1f0b122f-1411-4c19-8c53-730fd59b5dbc/95064961070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42340825-7e54-446f-be27-948273e5f3ec/17944214189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4ae65a-7fa3-4de7-ae90-5df6f30adeb2/fiwugosizuseguwuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4778ee11-794e-46e5-b41d-88419da2c535/53546096873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9667/7279/files/90725413442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2622/9666/files/rusanaratezuzix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9453/1486/files/wivibid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2906/5639/files/voice_therapy_techniques.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C47 5264 bytes
SHA-256: d3b660712952638a5565eb84aed96e7866384c15f3b7caad27c53061bcbcdfd7
font_01_sfnt_off00009e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2C 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000a6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6BA 10040 bytes
SHA-256: dcc1935a748403f6db93de7cebf8e723c8ab10e6695782c767f3638e32ffb4dd

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