Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e6cee0aff1476e…

MALICIOUS

PDF

37.5 KB Created: 2020-08-29 18:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8355b785ca2c59b8d330aaae7da291eb SHA-1: 78b7a39e82f44e0b8b86eb8bae3c05f0543a52e0 SHA-256: 53e6cee0aff1476e2272c92337222e4bc8d4634fed8749b972b0aa358148e51a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or to distribute malicious content. One of the extracted URLs, 'https://ttraff.ru/wix?keyword=this+lullaby+qotsa+tab', is flagged as a known malicious redirector. While many other links point to benign content, the presence of the malicious redirector and the sheer volume of links suggest a malicious intent, likely to lure users to a compromised or phishing site.

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=this+lullaby+qotsa+tab
    • https://static.usrfiles.com/ugd/4ae4db_8d5e93c7748249c2a478868162bcd907.pdf
    • https://static.usrfiles.com/ugd/b8c837_e779b13cfdce488bb4cb7acf164f97d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d05a729c1dd4c169673ba417321a4ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_f869c9e6f1204f20bb41cb2ded25ac0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8cb9ea401404c31bd09e45a5a2ed76b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b06b5aaf1a4144489b5c9a0afeb24d87.pdf
    • https://static.usrfiles.com/ugd/834936_2e52c489a7ad4fd187944198f5d27ae9.pdf
    • https://cdn.shopify.com/s/files/1/0440/1093/0341/files/axis_bank_savings_account_closure_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/vifemelugusuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/9012/4708/files/scientific_notation_multiplication_and_division_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3956/files/air_pollution_definition_causes_effects_control_measures.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbc11f2d3e3a4b10820ca7c305db3b2b.pdf
    • https://static.usrfiles.com/ugd/510a18_656ac30a57f2486dade19c7ac8e1c96f.pdf
    • https://static.usrfiles.com/ugd/b8c837_73340e03bf734e0db3ff44b49dbedbd9.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_off0000500c.bin
67e68fe4299669864e83b8250d911d6b00a558151214afd2412da4f4fba7a690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x500C 4992 bytes
font_01_sfnt_off000060ff.bin
481adb6e40a67907960a4876dac55336d5343fea75f81587b87af85446dd3c9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 12600 bytes

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