Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb30278e94f5e7b3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 21:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77ba30f75e0047f3d646a1089ad71a27 SHA-1: ff33628aad0a6980c3d479a521f07c2b1593dc15 SHA-256: fb30278e94f5e7b37e649b87b9ae76eed78137decb21276d10b4bc23381bad49
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=answers+to+common+behavioural+interview+questions'. The document body also contains this URL, suggesting the PDF is designed to trick users into visiting this malicious site under the guise of providing interview answers. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to obscure the malicious redirector.

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/pify?keyword=answers+to+common+behavioural+interview+questions
    • http://files.jkennedynyc.com/uploads/1/3/0/9/130969543/2c13f5ebaf46.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/simbologia_automatismos_electricos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/deadpool_kills_the_marvel_universe_kickass.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/bm_convert.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7697/files/cryptic_quiz_answer_key_5-_d.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/28457427598.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/jipodotorawodaxuvawirukub.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_off00006a79.bin
c0c946e4197a9bab9b572d9bb54c847f15dbed5489fad7c863474b58ce454147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 5444 bytes
font_01_sfnt_off00007ce4.bin
a8116b0c6b0c2496c06dae34eaa0ec36c8f77027cbba5f4451af686fc59b9084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE4 10140 bytes

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