Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bd8fdebb0a1b26…

MALICIOUS

PDF

43.5 KB Created: 2020-08-28 13:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7c9af85e6c501037e96f6983c8cfd1 SHA-1: 3c554912f623aaeea467b03c83c105ca9c5ffba3 SHA-256: f9bd8fdebb0a1b26e6f167bd0bd08b3cda583089473737da968e076b0a1ccc11
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify, likely to improve search engine ranking and distribute malicious content.

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/pify?keyword=declaration+of+independence+printabl
    • http://files.heritagehs.org/uploads/1/3/2/6/132682966/9133864.pdf
    • http://files.meehanmentalhealth.com/uploads/1/3/1/6/131607063/16c5ecff.pdf
    • http://risikum.lindsaysilva.com/uploads/1/3/2/7/132710797/a1bcead.pdf
    • https://cdn.shopify.com/s/files/1/0437/6965/9549/files/list_of_opposite_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/wristband_mockup_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4850/files/toro_timemaster_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/gugupupasugipamizimufob.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/15896442462.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/73974050663.pdf
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/tafopatovefawotorid.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/48962355655.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/fogeparegumiwaxejudagov.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/fashion_design_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/71314793174.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_off00006c54.bin
babef84a45ba5b0ebf56a76870cf588a6b642bf5f097d2a59fb3242ba97c4ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 5112 bytes
font_01_sfnt_off00007dbe.bin
a7e416f00748666e43dd036c80c6f40d333598c5e0d85f768ea16dcb5d3510aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBE 10268 bytes

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