Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a0ae6fb55c09d4…

MALICIOUS

PDF

68.5 KB Created: 2020-12-27 02:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4e6bd9dce19d0648d7239dabe5f87998 SHA-1: d814194470d333b4c02e69252b308a565bc3a753 SHA-256: b7a0ae6fb55c09d403152445d5d51881979448fb05535d7dd7a4ef1107944cfc
214 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains a critical redirector link to 'ggtraff.ru' and is part of a PDF link farm, indicating a likely attempt to manipulate search engine results or direct users to malicious content. While no scripts were explicitly extracted, the PDF structure itself is being leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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/strik?utm_term=children%2527+s+beds+with+slides In PDF document text
    • https://cdn.sqhk.co/goluxewimabu/6hdMphd/gelevorerisop.pdfIn PDF document text
    • https://xegejibizagufom.weebly.com/uploads/1/3/4/8/134851168/2619737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nademopor/mcdonalds_fish_sandwich_calories_and_fat.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/vofulilik.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/satavawuwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/lixudapisalukugaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20168599-07ee-4493-892a-473efde1a66c/545325031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60edb117-c914-4916-ad81-5dbc3f9add4b/gloucester_love_in_king_lear_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/42434944828.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/15432741872.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_off0000d05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05F 4872 bytes
SHA-256: a43cee4435dadb0bb7a05fd65a8a2dfe51b6d74d91f32dbfcdc05063415f7527
font_01_sfnt_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 10680 bytes
SHA-256: 037041171223e08fd403599918eff3cae66a1e904e5a4d1d94a6d8bfb39eb853

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