Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a6b10c181a4d42…

MALICIOUS

PDF

60.0 KB Created: 2020-11-19 09:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a1f1f1cae67ab47d577f8cba8ace863e SHA-1: 05957f65a62748bb9e7d9ab0ad18e4213263bbea SHA-256: f9a6b10c181a4d42ab77ba160269e365efb2085207246ab216e937ebcbffe9cd
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates an attempt to lure the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://ggtraff.ru/123?utm_term=memorex+mi4604pblk+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5faf582f7ff70.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/gufizetupo.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/4c54c21.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/3836618.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/01f879146efa22a.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/17906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f8efab23afbe.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/1dbbb3dc-c389-4a56-96b0-323d2f364fd2/57130539553.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/welugatafamisaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d15b02c-d282-4e27-8c7c-0b979318ef33/47706380072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db80f472-9996-43e5-ade0-f60f55e884f7/laradoxisazafijovel.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/junosov.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/53989494571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646a253f-d810-47e5-83ec-2571abfcf8ad/29951597570.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

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_off0000ab69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB69 5448 bytes
SHA-256: fda732c4ee8e5e7d59ece43c9d4838607d7cb08cae587ff2e9569f6a1cd2c8ef
font_01_sfnt_off0000bde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE5 10804 bytes
SHA-256: e9b85bda68035bd42fc530918905d23863a494e4e7dae2bff366d37624f04921

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