Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ef2ecbdba7a511…

MALICIOUS

PDF

53.2 KB Created: 2020-08-06 16:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0dba9ba778572ea5ccc98fdf3b47950 SHA-1: d084da01175f9508e691d4bb30c9b9674f4dc1d5 SHA-256: 36ef2ecbdba7a511c387055617151bbd797e9e40b9cc1b35778f9c4316153c14
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL points to a redirector, and the document body, though heavily obfuscated, contains a reference to the same URL. The primary intent appears to be directing users to malicious infrastructure through a deceptive link farm.

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=periodicity+of+physical+properties+pdf
    • http://files.serenityspaceyoga.com.au/uploads/1/3/1/4/131438180/fetubijadopodig.pdf
    • http://files.josiemusicawards.com/uploads/1/3/0/7/130775244/1cf1f689.pdf
    • http://files.amomentintimeartwork.com/uploads/1/3/1/4/131452952/3842979.pdf
    • https://cdn.shopify.com/s/files/1/0438/9706/1531/files/datep.pdf
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/53178989146.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/39732388369.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/vekiruruzozegovowexu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/wolurajugudoxug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7948/3048/files/mobalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/lexetelutiruxikovolafaril.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/tuzerubojofasejorumeju.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2808/files/jijisoxefopuliburepop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/pexuke.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_off000090a0.bin
c54f46dd594802240d5d9dce1a352f8b11ce0b90c3ec28c8b55740ab78aaa70d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A0 5348 bytes
font_01_sfnt_off0000a2d6.bin
bce8de7ccdc845e87e2d74e5d0b18b20a5a7142ea7349108edb23f0777589037		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D6 11324 bytes

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