Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e3ab8f854db748…

MALICIOUS

PDF

53.2 KB Created: 2020-08-21 14:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df695e8b396169e8f2c6b07de1da41d4 SHA-1: 9c7338ff6e66f588fa3e292e710ccdddf45fa81a SHA-256: 24e3ab8f854db74849d207c922b4d657ebd43c6399d5f3b962b1f42047cc9e50
142 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=halyard+isowipe+safety+data+sheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, one of which is hosted on a suspicious subdomain. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise its true nature. The presence of a callback lure heuristic further indicates a phishing or scam attempt.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=halyard+isowipe+safety+data+sheet
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/19939071503.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/13128928713.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/sorting_algorithm_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/12352615033.pdf
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/utah_dispute_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0436/3884/9696/files/sakojir.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/72480724584.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/72777800264.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/vajimatefetexeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5223/files/14368699746.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/nuvujozuvefiribin.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_off00008728.bin
1f0bd2c798e952a933b8b45a0c7510e31db3cabd3c8eb84a0fb050c199d59d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8728 5284 bytes
font_01_sfnt_off00009930.bin
74e73d96b4ffc2e329a1838a6265c55395309e94c0beda85a8e794bc210fc43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9930 15148 bytes

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