Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9173b2d6da35034…

MALICIOUS

PDF

32.0 KB Created: 2020-08-09 18:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df31b50140e6f90f45060220f0ec9ef SHA-1: 10cd54b7d006e4f12d8ff47904294e0204456e82 SHA-256: b9173b2d6da35034921a77fb6d862bd29d67d55a6fdea699ac26ed6f12d55f7c
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.cc, which is likely used to obscure the final destination of the malicious payload. The document also features a large number of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to distribute various payloads. The ML classifier strongly indicates maliciousness.

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/pify?keyword=activator+methods+protocol+pdf
    • http://files.abdg.info/uploads/1/3/0/7/130739786/xaguwufidutozuxojut.pdf
    • http://files.meldesignworks.com/uploads/1/3/1/3/131379223/zawefewuxurute-lamegux.pdf
    • http://files.sslaughterhouse.com/uploads/1/3/0/7/130738949/6165632.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/48761440283.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/45684671643.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/gadenoxumeterejerojefabe.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/12725260017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/piluzofamisinozanatumixat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/17083857765.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/4307808663.pdf
    • https://cdn.shopify.com/s/files/1/0432/5277/7128/files/40664421523.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_off000040e9.bin
8cc3f7dcca6d7d6e29d67812d5baac5bba89d2209e7e9db746cf4cad3f7140f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40E9 5444 bytes
font_01_sfnt_off0000534c.bin
e765455fdb0b80647a7198503b635c5d8d88ad026c1315ea77db882b6499b4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534C 9376 bytes

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