Malicious PDF — malware analysis report

Static analysis result for SHA-256 2528d458c1ef1013…

MALICIOUS

PDF

118.6 KB Created: 2020-08-19 09:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c968c7c413ba721b157a12a2808ef2e SHA-1: 19cadb4f0fce88aca82cc3f88a6912e135e6bb36 SHA-256: 2528d458c1ef101333cb5600757d06e22880fb133b1f36e954220e7de22c3449
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=charanga+line+dance+step+sheet'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm or SEO manipulation tactic. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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=charanga+line+dance+step+sheet
    • http://webulavof.cambridgecharityfundraisers.com/uploads/1/3/0/7/130739553/peganej.pdf
    • http://files.mindfactek.com/uploads/1/3/1/3/131382092/7897176.pdf
    • https://cdn.shopify.com/s/files/1/0454/4672/5790/files/56206152819.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/norme_afnor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/simokijawowulezab.pdf
    • https://cdn.shopify.com/s/files/1/0451/7065/5381/files/interview_questions_and_answers_for_science_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/differential_equations_iit_jee.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/best_online_games_no_required.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/meaning_and_definition_of_auditing.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/41851604536.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/radosumakileju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/6629218653.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_off00018c84.bin
4f0dec3f4f6cb0dd7e7442a62d0830633391ffe0faa68d732a8d41ebf9d002ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C84 5240 bytes
font_01_sfnt_off00019e46.bin
06f3cce8a7aa5db4d5fd825e628d308fccdac033a90c424b9db7f56adb41e378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E46 14932 bytes

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