Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bec42697be68d6…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 17:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a984f8c30b4f8bd37aef9190bd217f SHA-1: e8de640f50cb3e6f2c716d8dbda403298b281d36 SHA-256: 40bec42697be68d626aac0d2890ee1594d87a75500eab2442611dc47a181b07b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=rc+model+aircraft+design+pdf', confirming the malicious redirector's presence and its lure. The primary attack pattern involves tricking users into clicking on these links, leading them to malicious infrastructure.

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=rc+model+aircraft+design+pdf
    • http://joser.alzubilaw.com/uploads/1/3/1/0/131070317/bupavutirodufud.pdf
    • http://kikel.orangeblossombooks.com/uploads/1/3/0/7/130739616/f575a2efb1.pdf
    • http://files.northphiladelphia-locksmith.com/uploads/1/3/0/8/130874587/vetan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/62058924553.pdf
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/security_supervisor_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5901/files/42492595198.pdf
    • https://cdn.shopify.com/s/files/1/0443/2792/7964/files/lolinipujuduvegotoruke.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2248/files/93815632554.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/22249781099.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/44054950943.pdf
    • https://cdn.shopify.com/s/files/1/0440/6450/6006/files/beginning_spanish_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/volapoguvulugerunovuge.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/39057185038.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/80446185639.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/jigurutegawak.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_off000065ff.bin
ed9fefd329f6718998d5c288dcd38d224b62be81a92b9212e817acf75e21f76c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 5484 bytes
font_01_sfnt_off0000788c.bin
05985ba2cf5fc8b7edac2e5cae1a14f7f450ff66546dc1bb06df7985ea764565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 12160 bytes

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