Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bbbf634edc5a37…

MALICIOUS

PDF

39.7 KB Created: 2020-08-28 13:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c054f7b79342578ec2d3c5a7b59024ac SHA-1: c9bdb6382997208eacd87228697b02944eb59a16 SHA-256: c6bbbf634edc5a37e2add8893f5eea3937bc9400804a437a499e96bfd4e96154
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic firing for a link to a known malicious redirector. The document body contains this URL, which is likely used to obscure the final destination and potentially deliver a malicious payload or lead to a phishing page. The presence of numerous external links, many pointing to Shopify domains with numeric slugs, suggests a link farm or SEO poisoning tactic to attract victims. No scripts were extracted from this sample.

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.cc/pify?keyword=wireshark+101%253A+essential+skills+for+network+analysis
    • http://jewaraso.d-aleksandar.com/uploads/1/3/1/8/131856072/7fe695da2346.pdf
    • http://tegutovim.mike-rents.com/uploads/1/3/1/4/131453114/kujojorusuwinu.pdf
    • http://fujafaz.rockinpfarmandfeed.com/uploads/1/3/1/6/131607407/6597731.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/39784444122.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/siruvar_kathaigal_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/70991917510.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/bowapaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/bomefebov.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/vezobulinaregatofanozel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1046/files/munarunavemuwogesira.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/89124784875.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/ribajofotomidijozajizex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/kulipedoremukoru.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/how_to_fill_airmen_application_form.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_off00005c26.bin
7b86462aa7a186deedc88bd25c681e0ad65fea663e9fbc5b9af8abfdd3120067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 5372 bytes
font_01_sfnt_off00006e87.bin
1803f955cf893d187ebc11985d5e7b988eeff059c1dca82e98695c8d7ff90b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 10380 bytes

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