Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4df4e4c283195c…

MALICIOUS

PDF

69.7 KB Created: 2020-12-17 00:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3ddba8b79920c34d522a2bbb435562c0 SHA-1: d5703f2e779bd1ccf9dd697a00a96e54a41cbbf0 SHA-256: da4df4e4c283195c817470f930b7803c58a787ccfac2fa6432a7b37628638454
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with one critical heuristic flagging a link to known malicious redirector infrastructure. The embedded URLs, particularly 'https://traffking.ru/123?utm_term=red+queen+glass+sword', are strong indicators of a phishing or malware distribution attempt. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=red+queen+glass+sword In PDF document text
    • https://jimitorivav.weebly.com/uploads/1/3/4/8/134878901/ed67f582a586e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_5fda879226ba8.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/rudutugo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388827/normal_5fd058f4a6818.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/kidinazopewur.pdfIn PDF document text
    • https://bitoxusimafitaj.weebly.com/uploads/1/3/4/3/134311342/2111876.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/julaxel/53185258269.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf75e6457125654ffca14/1606285152170/29277120224.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/calendario_enero_2019_chile.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/92693428081.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/94268997128.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/career_chart_after_10th.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/62520858337.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_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 5220 bytes
SHA-256: a19b0bbbf8b34bbfe1408d83f353eb1bdf8390e0192b463ce967b65863686a1e
font_01_sfnt_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 10780 bytes
SHA-256: 12ff4052d4a8f263827ec34dd6a0cdf3282a1324b36437a5010aed88a74eb4a4

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