Malicious PDF — malware analysis report

Static analysis result for SHA-256 b166e6a7f63e13e4…

MALICIOUS

PDF

49.3 KB Created: 2020-09-01 06:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d7389f925ce120330d60cf3a9824a8 SHA-1: 3b2cb2874ba567d42b40f695fd5997c379e6358a SHA-256: b166e6a7f63e13e48ebdf3a9e283e5628e81ff2f5ac4ea36c669d0b334abf301
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=collapsing+toolbar+androidhive'. This indicates the document's primary purpose is to redirect users to a potentially harmful destination. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=collapsing+toolbar+androidhive
    • https://cdn.shopify.com/s/files/1/0433/4095/5803/files/define_consumer_behaviour.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/analise_pest_e_swot.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/6963621490.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/nibinilawinulizuju.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/23570034205.pdf
    • https://static.usrfiles.com/ugd/defcb2_2d28514d609d451abbcb022cc88eb33d.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/lesanenopebikoxiziza.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/orient_bell_tiles_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/nuzusugubixi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/zivikateresofet.pdf
    • https://static.usrfiles.com/ugd/353d00_dc558cd664fa409ca4b77b7d5fdac0cd.pdf
    • https://static.usrfiles.com/ugd/b6edda_974f052b23c9410ea8b3eb8d10dd29c9.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_off000073c9.bin
89aba53ec4c0f9fc3736fd52c9cb885219a8ebbf4bfb03c52141abc8c1ba5bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C9 5324 bytes
font_01_sfnt_off000085d5.bin
8d9004e62db423c886e1288c31346612ef0c06600cb4c110f8138bd9445b20c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D5 16428 bytes

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