Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c9747a95708216…

MALICIOUS

PDF

64.5 KB Created: 2020-08-06 11:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49a726d76dcedb4b04526c624ab0c71 SHA-1: e293fbdd00f60fd52a664b90098d1d9d7633f352 SHA-256: 94c9747a95708216ec8ff0015161704a0860d546ed701fc46b49c2e3f6b0525b
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious component. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The ML classifier strongly flagged this PDF as malicious.

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=email+etiquette+pdf+2020
    • http://files.loraincompplan.com/uploads/1/3/0/7/130739532/wasuwolenevupe.pdf
    • http://bezujad.bristolbaycrew.com/uploads/1/3/1/4/131453598/zegukivurepopiraxulu.pdf
    • http://files.islandfibers.com/uploads/1/3/0/7/130738870/73371d3ffe18e3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/jajiwoxetizom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7364/files/black_ball_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/32_in_roman_numerals.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/scotts_push_mower.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/42._5_50.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/takagopaxutanoregifel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/64588488458.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/lowes_reynoldsburg_ohio.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/jelefop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/bamizewivifejegezewexo.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_off0000c0d4.bin
676f0d80042d404a4e2109a7f55337428dd78f93e5c7e67403b4a294146c7d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D4 5268 bytes
font_01_sfnt_off0000d2b7.bin
80d3e86fd1b9b6d60228bc51def7af1aa0436af8fa012271a9c7bc35d010607b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 10120 bytes

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