Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff939da58170008…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 16:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0041f8fc7bfe0dbc6d26d0a7d5d7c74 SHA-1: e64d94e1406d6b36dffe68d036e70ab6abf53f3e SHA-256: 8ff939da581700086a583a6b7ec5afcf47ebab9c29616dd19f6f2cea0fd448b7
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=free+excel+equipment+maintenance+schedule+template
    • http://files.shawnchays.com/uploads/1/3/0/7/130775952/b3ade18a0dc.pdf
    • http://files.gdmaris.com/uploads/1/3/0/7/130740078/b48c6a.pdf
    • http://ruzokarok.communionfellowship.org/uploads/1/3/1/4/131453850/vataredod-livutojagiv-lokunulepag-veseguse.pdf
    • http://wawonegos.shortandhelpfulonlinewriterworkshops.com/uploads/1/3/1/8/131856570/nuwesasimoxa.pdf
    • http://wawonegos.shortandhelpfulonlinewr
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/dezerunajoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/64756974026.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6665/files/83795708784.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/directional_pad_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/laravel_ajax_form_validation.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/best_free_android_antivirus_apps.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7688/files/46973397606.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/binogesedudogomiru.pdf
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/thermochemistry_heating_curve_calculations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/69988506189.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/imperial_valet_timer.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/97759114993.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_off0000797e.bin
f16443ed561318c761524a891c1851d9dca02f6574fcac9f2b3c04cd8387aaf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x797E 5460 bytes
font_01_sfnt_off00008bde.bin
ce5a06ca5ca39af1680c4d982b98888736fe2b9d8ecdd4edd91f5e4122c31f9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDE 10220 bytes