Malicious PDF — malware analysis report

Static analysis result for SHA-256 5139cfdc758d8e20…

MALICIOUS

PDF

39.7 KB Created: 2020-08-16 00:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 681943aeb3cfe5fd463e073cc8e5dc83 SHA-1: c6c41798d8bcc17f6bd7c563e593fed0fe3eefe4 SHA-256: 5139cfdc758d8e204d53ae6fee5d20233d84ffe8262c1b77bb1f590e22f6a3d1
120 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 a URL that attempts to lure users into downloading a driver. The document body also contains this URL, further reinforcing the malicious intent. The presence of a large number of external links, many pointing to Shopify, suggests a link farm SEO tactic to improve search engine ranking for the malicious content. The primary malicious IOC is the redirector URL.

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=qualcomm+atheros+ar9485wb-+eg+driver+windows+10
    • http://pulakaxof.kasalon.com/uploads/1/3/2/6/132695742/ragid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2544/8615/files/competition_analysis_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/83658050389.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/basic_english_language_learning.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/moronidapapimukik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/waziriwolikowafozereke.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/antihistaminicos_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/font_weight_html.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/63904996827.pdf
    • https://cdn.shopify.com/s/files/1/0433/5019/6392/files/vujug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/wibudivazeseso.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_off0000507b.bin
a4b3628db355d6fe8c245484234b456282934c44502a92940e8461d2035b494e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x507B 6492 bytes
font_01_sfnt_off00006695.bin
0dc348766eaeced417e5c084be4282ee81434c24cc9b6b110a889362a1d1a550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6695 13948 bytes

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