Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66dc0303005b2e7…

MALICIOUS

PDF

73.1 KB Created: 2021-01-13 15:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cdd6c5fa73c35a80ea60eaa249cf93c SHA-1: 7e23b574e9e34e3daaa5e7ca1633a7a9ee4096ca SHA-256: d66dc0303005b2e71a3e5503b5ebd42ca3359b61d84d70d497d09f3b97b07db7
222 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it contains numerous links to malicious or link-farming sites. The ML classifier also provided a high confidence score. The embedded URLs, such as 'traffmen.ru', are indicative of phishing or malware distribution attempts, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the document structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=artistry+supreme+lx+pdf
    • https://site-1166752.mozfiles.com/files/1166752/amusement_park_vocabulary_worksheet.pdf
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/3ceda651b4e43.pdf
    • https://static.s123-cdn-static.com/uploads/4475580/normal_5ffe7ad6b19dd.pdf
    • https://ligonulijer.weebly.com/uploads/1/3/5/3/135318365/zelumadokalub_fufanofatorif.pdf
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fb77a2580070.pdf
    • https://site-1166725.mozfiles.com/files/1166725/irctc_online_general_ticket_booking_app.pdf
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8a7c056d59f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jokotaziweluge/kia_cerato_2011_service_manual.pdf
    • https://s3.amazonaws.com/wonoti/46590345750.pdf
    • https://s3.amazonaws.com/fotepopunaj/57438112399.pdf
    • https://s3.amazonaws.com/mufukep/30994976070.pdf
    • https://s3.amazonaws.com/tokatefozude/scroll_saw_templates_letters.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d449.bin
638268a2d1ceae95a653060cc247e7d255ac476165d76ab5e085a8d57668e9ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD449 4804 bytes
font_01_sfnt_off0000e4ac.bin
4bf3ee907102baf477705a6d85efbce34e4e8824ea538658a4e1831eb2932d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AC 10916 bytes
font_02_sfnt_off00010a05.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 4324 bytes

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