Malicious PDF — malware analysis report

Static analysis result for SHA-256 422677047ab874b9…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 08:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb78160e70ca74c88dc638ae4921c8e SHA-1: d822df3ad40cadd6f0e7bb8ebe395f1355e46f7f SHA-256: 422677047ab874b9d4f3a68f16d8d376e93f4a1bff2618d18c3c92455f423797
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link that leads to a download prompt for a virtual printer, likely a lure for malware. The document body, though heavily obfuscated, contains the same malicious URL and several other URLs hosted on Shopify, suggesting a link farm for SEO poisoning or distribution. The presence of a malicious redirector and the nature of the lure indicate a phishing or malware distribution 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.cc/wb?keyword=descargar%20impresora%20virtual%20pdf%20windows%2010
    • http://files.agconfoodsafety.com/uploads/1/3/1/3/131398377/8906183.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/kalemanasidawutokosonebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/xitinisawigijuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/sasitatalilozudej.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/27326207352.pdf
    • https://cdn.shopify.com/s/files/1/0435/6354/8833/files/4133842348.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/accountant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/wezadutolositamuguxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/puma_air_compressor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/greenhouse_effect_causes_effects_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/curso_tecnico_de_caldeiraria.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/keltron_capacitor_datasheet.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_off00005c6d.bin
c4d1073dfc74aaecd1647ad755d709eb034279c478b42cf35f6c16b51b995d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6D 5820 bytes
font_01_sfnt_off00007045.bin
a8ad92b4d2d81f9c4111c57c078ce15cae44b8d6b1c59117ff0e5e632eb9f17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7045 10612 bytes

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