Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7cded55e356303…

MALICIOUS

PDF

43.4 KB Created: 2020-08-12 17:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc1b5c53caf8fda4bdfed584cdaea461 SHA-1: d4c0eca1dd0ff5ab44f022d4f8c46a285f5eabc0 SHA-256: 9b7cded55e356303e26e324cad1adc712e8b7ca3340873f3038f9d19f17f57e5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that points to 'ttraff.cc', a known malicious domain. Additionally, it features a link farm with numerous PDFs hosted on Shopify, with one specific link also identified as a redirector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of multiple PDF link farm heuristics and a critical redirector link firing strongly suggests a phishing or redirection attack.

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.cc/wb?keyword=textiles%20kadolph%20pdf
    • http://megog.pinckneymusic.com/uploads/1/3/1/6/131636725/eda2ea5a1d.pdf
    • http://files.arrivecollegeconsulting.com/uploads/1/3/2/6/132695491/nezewuzizexoma_suligeja_rorar.pdf
    • http://fawoguzeb.chartingwithkatie.com/uploads/1/3/1/4/131407197/7926301.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/dofaxanovifaloguzusoxuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/askep_aneurisma_aorta_abdominalis.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/vuzebidutepodaduk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5256/files/43026989547.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/wevogesidilulamupes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/14204532370.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/az_103_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/documentos_del_magisterio_de_la_iglesia_catolica.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/gudonutilapegowop.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/61796115212.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/golds_gym_450_treadmill.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_off00006788.bin
f38539433cba5d0de5ef1c28050e04e44af9592c148a013325317fd7fb35a2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 5112 bytes
font_01_sfnt_off000078ec.bin
d6ac123e71d60948aeba66bc868c95f373f3f2fa3cb282515915d4a8e14e6e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EC 12568 bytes

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