Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc54ad847f0b0934…

MALICIOUS

PDF

41.2 KB Created: 2020-08-26 20:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab934d68eb3a7f7359f0a666299baa17 SHA-1: f0a7d1355a4b6efd32161e655ccec0acde2a7a2f SHA-256: cc54ad847f0b0934270248112ea24a97ebb0acba10e469e6004e3940614a3337
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on Shopify, which is indicative of a link farm. One of these links, 'https://ttraff.ru/pify?keyword=anet+a8+baud+rate', is flagged as a known malicious redirector. The document body contains garbled text but includes the malicious URL, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest a malicious redirection attempt.

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=anet+a8+baud+rate
    • http://zewevif.booksandspoons.com/uploads/1/3/2/6/132695471/rupukur.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/43436532060.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/ginadazexam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5900/3038/files/9099979453.pdf
    • https://cdn.shopify.com/s/files/1/0437/2578/3190/files/24161891555.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6018/files/gastrointestinal_tract_hormones.pdf
    • https://cdn.shopify.com/s/files/1/0454/8123/0488/files/converter_para_dwg_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8072/files/29644254994.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/96106858877.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/6486966476.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/kupoxifuven.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/kodonotusetixozevebazut.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/legal_driving_age_in_california.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/fabuzux.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/dojusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/30975021868.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_off000061b3.bin
399c63469d3ab12ec7465e48fc3e1b4ae8aaecefa6d77aee439e8a88fd3e25a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 4932 bytes
font_01_sfnt_off00007279.bin
502298dedc0af535c7c962b370e72995e215fe651284f7c0be5442e29f0a737f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7279 11132 bytes

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