Malicious PDF — malware analysis report

Static analysis result for SHA-256 971a364c80351831…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 16:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a688c0007994ddc755708640c1a0bf96 SHA-1: 98f10e8347490f7e27f7b8528cd1d7ebee24be93 SHA-256: 971a364c80351831c644d32f42c4e809a4fa171138b68f97f21e9576ced1fe26
150 Risk Score

Malware Insights

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

The PDF contains a malicious link disguised as a guide for deleting ARK mods, directing users to a known malicious redirector. The document also functions as a link farm, pointing to numerous other PDFs, likely for SEO poisoning or to distribute further malicious content. The ML classifier strongly indicated 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.com/pify?keyword=how+to+delete+ark+mods
    • http://files.stsrx.com/uploads/1/3/1/4/131410812/pedar_lavivudexuk.pdf
    • http://files.crownlifeseminars.com/uploads/1/3/2/7/132710669/fizezad-ronux.pdf
    • http://files.callaneventplanner.com/uploads/1/3/1/3/131397996/difezimid-fivijefav-waxituson-xireb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/zizatamubuzetopitom.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2046/files/11215159654.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34292265756.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/68767332745.pdf
    • https://cdn.shopify.com/s/files/1/0435/9172/9309/files/betadine_24_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/jafabenalowanuwekumiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/fujonurakuvoziwele.pdf
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/xemofiralinidifalijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/77441178813.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/89662806758.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_off000067c1.bin
d36df7c00bf85434316000be5108e34697a831e9e79585520f7166781e58884e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5088 bytes
font_01_sfnt_off00007903.bin
7e875689400941bcad0926c63ba87885bc91689d6f289669623d21a91e03090a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7903 10088 bytes

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