Malicious PDF — malware analysis report

Static analysis result for SHA-256 826cf4412300834b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 00:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 485ec600ba424975d2148df0b7f04089 SHA-1: bb096e96f22f88a85cb0fad159a6f5376aaf4429 SHA-256: 826cf4412300834b946ce5f3ce371e6f53dff088fcc3886d0420bd2f51ad2cb4
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Gift voucher template uk free' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious IOC is the redirector URL, which is likely used to host or chain to further malicious content.

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=gift+voucher+template+uk+free
    • http://tomirad.hagmian.com/uploads/1/3/1/6/131636612/limuwisujuzomubiwaw.pdf
    • http://files.nicolaasmostert.com/uploads/1/3/0/9/130969238/33d134.pdf
    • http://files.shupesontheboardwalk.com/uploads/1/3/1/0/131070336/9541131.pdf
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/48280932933.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/autobahnkarte_schweiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/sudo_etc_init_d_vboxdrv_setup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/ragomogagowam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7366/7225/files/upload_a_file_with_react.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/10217090408.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/negimew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/xoniza.pdf
    • https://cdn.shopify.com/s/files/1/0447/0338/3708/files/star_wars_the_essential_reader_s_companion.pdf
    • https://cdn.shopify.com/s/files/1/0443/3421/9420/files/malonic_ester_synthesis_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/nijebifapiwuzowufoj.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_off0000640e.bin
db7223eb368f259d33c6dd4f74f6a683db696e1d5a5f1ed0a23004e79ac7c46a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 5232 bytes
font_01_sfnt_off000075c4.bin
612b7d18f8feb54b64132487bde73ed97bf7e51c2ea80c2fab3e9f9179ad2b64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C4 10240 bytes

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