Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee99c596e7bce63…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 12:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ec727c59c38422e0dd5dcaab170a45c SHA-1: 3513784b0bca4caf96869c8d9eeae054cd44ae56 SHA-256: dee99c596e7bce6392dd0769c8da2d360cff6e966abaa2d00ebff86a71386290
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=iron+fist+kung+fu'. The document body, though heavily obfuscated, also contains this URL and references to other PDF files hosted on Shopify. This suggests a campaign to lure users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=iron+fist+kung+fu
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/3423645234.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/89217504437.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/24385820619.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/rozisinepoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/0384/5541/files/41671507487.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/8650956709.pdf
    • https://static.usrfiles.com/ugd/b8c837_b598d61539d341b69596c25235f27f7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_290bc459e8dc47b8aea4d3692838abe0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b50bcbcf018438aa93353c7cc087134.pdf
    • https://static.usrfiles.com/ugd/b8c837_096c9ef2c21d4edd99528077ba3309ed.pdf
    • https://static.usrfiles.com/ugd/f0e51d_32e6fa609a4e400f9bcbf126b12fb405.pdf
    • https://cdn.shopify.com/s/files/1/0438/6612/8549/files/conners_3_self_report_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/14655444133.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.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_off00006a41.bin
9b96956e1c419b36da2cabc28907b36e70f63423fc28022aec819f1ab5f3d916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A41 4692 bytes
font_01_sfnt_off00007a55.bin
dd2e6350403e6f268476f6258daa84cbf74823224216fe3fe493f8508b799cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 10376 bytes

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