Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea9bfd05fdde906…

MALICIOUS

PDF

72.6 KB Created: 2020-11-28 08:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 604314ac5136e1efb01c354743233baa SHA-1: 16ccfffdd13138d27dcdc986ea90fde584989e6c SHA-256: 0ea9bfd05fdde906a6cd25aa6c32b72ef09884381456d54c525d65110b64e454
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The primary malicious URL, https://cctraff.ru/strik, is likely used to redirect the user to a phishing or malware site. The PDF's structure and the presence of many external links suggest it's part of a link farm or SEO poisoning campaign to drive traffic to malicious infrastructure.

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://cctraff.ru/strik?utm_term=toro+personal+pace+lawn+mower+parts+diagram In PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/231e7f91fb4.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/rosesevew_tezafa.pdfIn PDF document text
    • https://letitelow.weebly.com/uploads/1/3/4/5/134500939/tizijiponigul.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/5be825dd-c6b8-4e9e-93c6-b1c1d6a61122/gotirilefigurexuxeradufus.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/maths_trigonometry_formulas_of_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36af1af9-3b9b-432d-a8d9-63361b0caf1b/43335675269.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/44082216230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c111f5c-4ed9-4212-839d-b86b2783b6b2/1845446139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86c71d4-30cb-498c-b85c-e93727ef3cbe/danotumisasurazufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd94475-a759-44af-9978-139170519a1d/34399529786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80f838e-f2b8-4ebe-84ae-ef6dfb58fc3e/dotonutonelabomapinej.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/69514210644.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_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 5436 bytes
SHA-256: 15fa54edbd2d1a0a0078c65d5a862f4b12c90d27d768db110c42ab74da6563f1
font_01_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 10576 bytes
SHA-256: b8dfe3dcc5ca109fca57ee1002fc79502caf6d30a1c69af5a79cfc46831b9be2

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