Malicious PDF — malware analysis report

Static analysis result for SHA-256 29293aa4ff2007c7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 23:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b499623759adf9ae7e9330270b9a13 SHA-1: aa359f2dc2f96cfe5bfa56b115deae6e27813cd2 SHA-256: 29293aa4ff2007c7eebcceae4b6444f2ab23800400c872343c042a0790f17636
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a pilot script PDF. This indicates a phishing attempt to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious link is sufficient for a high confidence assessment.

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.ru/wix?keyword=six+feet+under+pilot+script+pdf
    • https://static.usrfiles.com/ugd/b8c837_74e0458252074051bff3d1f92af7861c.pdf
    • https://static.usrfiles.com/ugd/7ff653_21f4d92839ec4e93ac69277fb834073c.pdf
    • https://static.usrfiles.com/ugd/63d3ad_ed0336ceaef74a5fa314cae69915c82e.pdf
    • https://static.usrfiles.com/ugd/b8c837_89a15ef2bbdf4668aa61d531536b533c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1120cf36c456447ea4535e950cd98174.pdf
    • https://static.usrfiles.com/ugd/5ad03d_add260fa6cf044e2ae830fe83b3271af.pdf
    • https://static.usrfiles.com/ugd/b8c837_65257470cdfa4353843b286775c9c074.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee299560ee4442fbb99473f9bbd577f1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/50080795394.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/zimijapagit.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_off0000621c.bin
81abd989ecee0eb917853224dcae4b782611455f7ed5434a8908b90e385e1015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 5112 bytes
font_01_sfnt_off0000738f.bin
10d7765dbee37a5396c632f9293788eeeb933d791bc51850eb92d6601beeef70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738F 10012 bytes

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