Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9f9d31519b762a…

MALICIOUS

PDF

52.1 KB Created: 2020-08-09 23:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f790d9ce10f5c183b583c97f29d516b SHA-1: 3882bafe486ec7babe66202317cf458cfe02cd92 SHA-256: 1c9f9d31519b762ad058f993395483e45163bcdc6ff24aca7231525f7522b9f3
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=legal+dictionary+english+to+telugu+pdf, which is the primary lure. This URL is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

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=legal+dictionary+english+to+telugu+pdf
    • http://files.gracebaptistchurch77.com/uploads/1/3/1/4/131453396/gibolapowogejet.pdf
    • http://files.yowzersigns.co.uk/uploads/1/3/2/8/132815791/8621435.pdf
    • http://files.eastsuburbanconnect.com/uploads/1/3/1/4/131438059/4040019.pdf
    • http://guwivivu.spiritual-alignment.com/uploads/1/3/0/7/130775403/giroxamud.pdf
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/eugene_butkov_mathematical_physics.pdf
    • https://cdn.shopify.com/s/files/1/0435/4369/1419/files/56622804236.pdf
    • https://cdn.shopify.com/s/files/1/0439/4316/6107/files/zonepikumifu.pdf
    • https://cdn.shopify.com/s/files/1/0445/3462/8516/files/helix_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/3335699951.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/38333551893.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/21954066471.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/21292500674.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/exciting_feelings_imgur.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/ant_build_xml.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7116/files/dagusivuxufes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a2.bin
eea9311724c1a3488b87cebb1f94575116581703a4c269aa6cbad51e64368743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 5460 bytes
font_01_sfnt_off0000793d.bin
cd3383487176ce43217f081c4fd38275e14f2fc172ffa18c5ab28a8c925b67af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 10328 bytes
font_02_sfnt_off00009628.bin
8e4e7d7e25b8182871edc0977e58458bfe2235b359bb03808303cb20c1574967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9628 14668 bytes

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