Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d57181a1c19432…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 12:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3baf911188ba484ce5fb65cc291b06e SHA-1: d4262bc5a6d7a5d17a1d0fbe2c27b8a3334a6f82 SHA-256: 32d57181a1c19432e9ad83f1b4c2919315048b5a3d2d2cd57965364230346681
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text related to 'graduation certificate template pdf' and embedded URLs, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.ru/pify?keyword=graduation+certificate+template+pdf
    • http://files.creamwoodlabradors.co.uk/uploads/1/3/0/9/130969254/lilevigipidulos.pdf
    • http://lotufi.pinkdreamz.com/uploads/1/3/1/4/131453984/gumivenimilatazot.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/basic_electronics_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/navuroki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/pokujagikem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/avg_free_trial_30_days.pdf
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/back_bearing_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/80261885424.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5765/files/gekezesolekitod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/84050873545.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/jipatuzifamezudik.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/japaxoxadepereza.pdf
    • https://cdn.shopify.com/s/files/1/0436/0830/9923/files/57423687289.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3f.bin
0b222b95a29978af103ee3d1bef1c689835c8c5f3dc07e59abb786e9755831bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3F 5156 bytes
font_01_sfnt_off00006eb7.bin
721d16e8ea19517e2a60b9be4b6d84c091b99fba535e1883bc76a50ea6d87dbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB7 10224 bytes

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