Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9de9a9af765cd25…

MALICIOUS

PDF

66.2 KB Created: 2020-08-08 14:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b7d7d8e7c5554e419207a83a999ab63 SHA-1: 0856d98f18eb052a857d82bf317aa0ffb4b207fe SHA-256: c9de9a9af765cd2511500860bbd708cdaca45d13482b653b37b8762c1de52461
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=fetal+brain+development+pdf'. It also contains a large number of embedded links, many of which point to shopify.com domains, suggesting a link farm or SEO manipulation tactic. The document body contains the malicious URL, indicating it's intended for user interaction.

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=fetal+brain+development+pdf
    • http://files.yvinternationalbusiness.com/uploads/1/3/1/4/131482968/ba4bcbfee0f.pdf
    • http://files.lindalgraham.com/uploads/1/3/1/4/131455283/7d86161771d526.pdf
    • http://files.euchaos.eu/uploads/1/3/1/8/131871745/7791021.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/508618619.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/wuvipajofamunodel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/exercice_algorithme_simple_avec_correction.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/jalomurefuxibakavevozenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/discussion_method_of_teaching_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/lezepilirijefupuwilita.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/fatijadijunugokatulumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4485/files/mitokit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/69766602601.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_off0000c6c8.bin
4ec35311b3b1a8414b36b539f0d0e2ef33d48bc3c87f6b12113f9306d1b9a50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C8 5164 bytes
font_01_sfnt_off0000d84a.bin
cd1db36eb7b58aa0946f95fb7533e8b50763d5cf80d9008e73ac4ac919b8b83f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 10436 bytes

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