Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe7333a132c3979…

MALICIOUS

PDF

42.2 KB Created: 2020-08-28 22:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995f7022374ffb2211e52c1e6bc21381 SHA-1: 4a4c214c7668328fa07c10d020a955594c206747 SHA-256: 9fe7333a132c3979fed636305245e7761980721e102d19994bd17e12b8eca687
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large farm of external PDF links. The primary malicious URL identified is https://ttraff.cc/wix?keyword=1%252F+8+architectural+scale, which is likely used to funnel users to a malicious site. The document body itself is heavily obfuscated and contains numerous benign-looking PDF links hosted on Shopify and other domains, likely to mask the malicious intent.

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=1%252F+8+architectural+scale
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/sinoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tukesameb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0451/1626/0517/files/honda_eu3000is_service_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_11e581ef13624aa7a70b29450cc945d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe4806c12d940f59fa3b05f91102399.pdf
    • https://static.usrfiles.com/ugd/b8c837_8af242500e944e1386a1ccb6cee31993.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecdd369a514c4b62820ed775c77ba857.pdf
    • https://static.usrfiles.com/ugd/b8c837_57f863d9bab34c468be7b9f1bb901095.pdf
    • https://static.usrfiles.com/ugd/b8c837_11d6c5dc5fcd45b691e18ddb7d4e19c8.pdf
    • https://cdn.shopify.com/s/files/1/0434/8700/2790/files/86919286162.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/77553880862.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/kukowodaxabilozerur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/bilge_oil_water_separator.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_off000061ca.bin
88e7b2c74c8bd475e1d139e5c0a8c7e72c08995b81c0edf5df9555ef06aeb38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 5076 bytes
font_01_sfnt_off00007307.bin
fe27db922428f4245750b6107f132944afa9f66a7e4cba718babb49023295655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7307 13020 bytes

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