Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77681cc8364cd23…

MALICIOUS

PDF

44.4 KB Created: 2020-07-24 15:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae486a443cef6aec7957227781ab6e5b SHA-1: 01496b59cea4666ec23a7926255355e52477a8d0 SHA-256: d77681cc8364cd232d9e3ed2fe5b4b32a8c05a605ddf21ff2004de3b21ad6cf0
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm, with numerous links hosted on cdn.shopify.com and other domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=minecraft+1.+8+8++mac
    • http://files.dollarmovement.com/uploads/1/3/1/6/131636954/gimolamujemedikefut.pdf
    • http://files.duidelijkengels.nl/uploads/1/3/1/4/131438641/bebijovojow.pdf
    • http://files.whitelakeholidayresort.com/uploads/1/3/0/9/130969428/bizilabesobiwunaki.pdf
    • http://files.chino77thcavalry.com/uploads/1/3/1/4/131411542/4188227.pdf
    • http://files.whitelakeholidayresort.com/uploads/1/3/0/9/13096942
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/liwagogofovibivokovotit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/tuwov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/jofaroxuduwigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/36145884374.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/xinekezidibuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/79689675033.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/13790687242.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/78584684921.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/62152804822.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_off000072e1.bin
22db49c0e54acd119b0023223de910eacbace82325e6f489f387e11ca80c7f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E1 4776 bytes
font_01_sfnt_off00008302.bin
8fa2df476a6576087538c3d0ae3614cdc321a068e7372231395ca1624da73488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 9952 bytes

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