Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0324962779da2c7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 11:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abe8f5d16e7100bbf164b0373ebcf244 SHA-1: fb5ae540efd47edcad17355b725e2dc94a012766 SHA-256: f0324962779da2c70522807142998d665d212f89772cda410338751397b444ee
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=cancer+research+brand+guidelines+2018'. This URL is likely used to redirect the user to a malicious site. The document also contains a PDF link farm, indicating a potential SEO poisoning or spamming campaign. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=cancer+research+brand+guidelines+2018
    • http://files.sarasotavirtual.com/uploads/1/3/0/7/130775195/wefotavulufo_palefogawuve.pdf
    • http://woginotun.aculinks.com/uploads/1/3/0/7/130738848/wokawubagewog.pdf
    • http://files.naturaholistics.com.au/uploads/1/3/0/8/130814902/bdf1a24.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/92695618213.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/best_self_scholar.pdf
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/36402749530.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/basic_concepts_of_coordination_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0437/8696/1045/files/22172367954.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/asteraceae_family.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/4379912522.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/bsc_syllabus_mumbai_university.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/bareto.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_off00006605.bin
1b466a72e8a8f3d940e570218377ed99e62df5e693f53cb1141bcce8d73aaea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 5768 bytes
font_01_sfnt_off00007996.bin
c14546c4ca0307f272840d3bd0f24ce82f280f0812c9c59e340698e67de83b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7996 10848 bytes

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