Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12660f3c55766a3…

MALICIOUS

PDF

52.6 KB Created: 2020-08-02 14:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edba4219ddf2c0dbc6102db4847fbcf2 SHA-1: 68cc0f3864e3b954eb93cd0598d23bbab6c8ca4c SHA-256: d12660f3c55766a365953f1c66b2bfcf11a1d9e8df7c104b6b9a4e4227d65554
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=886+country+code'. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=886+country+code
    • http://files.traceyfox.co.uk/uploads/1/3/1/1/131164567/saxajuzibobemizavum.pdf
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://files.henriettagee.com/uploads/1/3/2/6/132680986/gegorivajeraxo.pdf
    • http://files.hccbillings.org/uploads/1/3/1/3/131398100/fuxejirevizigoj.pdf
    • http://files.marisatorigginoyoga.com/uploads/1/3/2/6/132695571/fovimezakefes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/gutupuloderugusiwageriw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/38031984299.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0534/files/xidimifekufapexaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupuxisupevijerabufogete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/70026947811.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/36306968123.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/sekonofudiwemuwuzanirat.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/goguviduxexikasutumi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/makokesubiniv.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/jquery_change_style.pdf
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/wowasixupidogetumada.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/skyrim_high_definition_texture_pack.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697c.bin
5cf65ad3d7f56d6f0e809ce29b7fcde7cec97a4f9024f4a5bcf7e741e976bf7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697C 7656 bytes
font_01_sfnt_off000082c4.bin
adb98252231fa22fc0032f1f0b1fbe1a65b89c5361164f9ec0a453515bc9454c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C4 4700 bytes
font_02_sfnt_off000092ba.bin
385fa8edc1929b3bc97ed0482ef4ce415fdefb214f6c00fe3fe75b998453eb99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BA 10484 bytes
font_03_sfnt_off0000b699.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB699 4324 bytes

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