Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86212bc84c3d042…

MALICIOUS

PDF

62.7 KB Created: 2020-08-31 06:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da01a0ee67a4c0aeedb13df2994e75e SHA-1: 36cffee68ec26b73b0d30f66ba36b2bfa3bf86c5 SHA-256: f86212bc84c3d042435aada678d431954e0309deccd9c8bc8a5c3bca032ec60e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. This URL is embedded within the document's body, suggesting an attempt to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic. 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.com/wix?keyword=lucky+digit+cookie+clicker
    • https://cdn.shopify.com/s/files/1/0440/5533/0981/files/materias_primas_ceramicas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/terakeribetopudowofewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/nios_class_12_psychology_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/mikuni_carb_tuning.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/kuzipekon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/abordagem_humanista_da_administrao.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/macos_10._15_catalina_iso_image.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/86266222424.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/ansioliticos_y_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/jofaxale.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/psychology_hockenbury_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0447/4303/2981/files/edital_auditor_fiscal_receita_federal_2020.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_off0000b87a.bin
85939621dc1bcaf39d450cde3bc62b24f2510871ccd2957d7317ca7e6c6e1090		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB87A 4824 bytes
font_01_sfnt_off0000c8fb.bin
9f7652917969fee50dc859d0427b297109c9eb0783d28889c44890eaa149caf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 11176 bytes

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