Malicious PDF — malware analysis report

Static analysis result for SHA-256 9719a8154eb72509…

MALICIOUS

PDF

35.3 KB Created: 2020-08-13 13:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4206e5a6a1ef2221a15adaebb13f0920 SHA-1: cd8d597ac719ccb1a6d8fc0580fcdf73bb0b6bff SHA-256: 9719a8154eb725094347abd438fb2af704d40c3d0fb84cefaa15229e0b0a900f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=administracion+de+recursos+humanos+pearson+pdf'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility.

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/pify?keyword=administracion+de+recursos+humanos+pearson+pdf
    • http://files.illustrationpad.com/uploads/1/3/0/7/130775583/60d2ba971a953.pdf
    • http://vikava.esstucco.com/uploads/1/3/1/6/131636725/vejezomiw_nadunegemed_zigovoka.pdf
    • http://files.rebeccagrayyoga.com/uploads/1/3/1/4/131407469/bba79c0e8f63fd.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/suwejerepoxel.pdf
    • https://cdn.shopify.com/s/files/1/0435/8530/6782/files/kaufland_letk_v.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/barmer_patrika_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/21932054451.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/wuxawageloziruwudebum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/92045096585.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/6542112670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixet.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/pdf_voice_reader_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/21946335971.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexivopagutufaxusezonav.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_off0000495d.bin
ecc18c9b0cd7387e8be508703249d7a0000d58546ecd0308e3a818479adbb050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x495D 5352 bytes
font_01_sfnt_off00005b5c.bin
3aaa26da6cf3b582a7f635e0e0d3beec932ae8c4bcfc8b582135871b02ce0da2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5C 10836 bytes

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