Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af4cea4e866d4e9…

MALICIOUS

PDF

44.8 KB Created: 2020-08-06 09:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cfebd67866c73e352fceccbc4cb10cb SHA-1: 50c06b38fd4024e68e689975e8d3809734b4ef12 SHA-256: 3af4cea4e866d4e943927dcbe7a8b937ebede28e753227a1d2b0979f825d6df6
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=fairclough+critical+discourse+analysis+pdf', which is likely intended to lure the user to a malicious site. The PDF structure and link farm suggest a social engineering tactic to distribute further malware or phishing content.

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=fairclough+critical+discourse+analysis+pdf
    • http://files.rams-doc.co.uk/uploads/1/3/0/7/130776462/rekebu.pdf
    • http://files.bencheetham.com/uploads/1/3/2/3/132303378/5314892.pdf
    • http://files.autolandcars.ca/uploads/1/3/2/3/132303077/bafot.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/21626420000.pdf
    • https://cdn.shopify.com/s/files/1/0446/6769/9353/files/bcd_7_segment_decoder.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/javascript_get_two_digit_month.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/34138049897.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/86322066927.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/p7b_to_crt.pdf
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/jixuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/95007656768.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6744/files/50993656647.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/construction_submittal_form_template.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_off00007104.bin
776c20b55ed28072e58a85dfec72a3392950a2ef3ceff0632ebf40458f2f0b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 5472 bytes
font_01_sfnt_off000083a1.bin
70b00e510253799f76dfe68f1d4fbf46404655edd6d47bccf2fca259a809dade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A1 10176 bytes

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