Malicious PDF — malware analysis report

Static analysis result for SHA-256 b703c6422370921d…

MALICIOUS

PDF

54.2 KB Created: 2020-08-16 13:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fbdaae7d1a5f18f4112f44c6e698462 SHA-1: ad50cea3b108741117bb004d93a50148df97b604 SHA-256: b703c6422370921ddbe246b272296126aacd5f51feef3837f4e57031b9719487
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to redirect users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=econometric+models+pdf'. The document body, though heavily obfuscated, contains this URL and other links pointing to Shopify domains, suggesting a link farm designed to distribute malicious content.

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=econometric+models+pdf
    • http://puzevedo.kelseybrownedu.com/uploads/1/3/0/8/130813136/xunebipono.pdf
    • http://dopatumel.rawearth.ca/uploads/1/3/1/4/131453520/mukigerowotiguwizulo.pdf
    • http://files.effinghamelementary.org/uploads/1/3/2/3/132302944/detoduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/vukerakuriduzugamamuf.pdf
    • https://cdn.shopify.com/s/files/1/0451/8805/5191/files/34544301735.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/microbiology_culture_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/giketufusisuliboxetilodig.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/the_wheel_of_life_elisabeth_kubler_ross.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/rapid_appraisal_methods.pdf
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/9426839491.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/silugazexowo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/cazadores_de_sombras_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/41424777601.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/86998724591.pdf
    • https://cdn.shopify.com/s/files/1/0429/1782/2620/files/22443249170.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0152/files/18154394781.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_off0000960d.bin
4abfaa7870e5f5434c1d069b73a473aef4683ffc8601af87c0bb3b45a2ba01a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960D 5048 bytes
font_01_sfnt_off0000a71d.bin
90a4ca56d9035ab4561d6bf6cf0930a7750ef6cdb292d15275f68364b44ef8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 10856 bytes

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