Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a53c92850319d5b…

MALICIOUS

PDF

46.3 KB Created: 2020-08-25 04:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f622bc0b2d8f4dc4e0453e8b4b35def SHA-1: 3e264345beaeb0251012bb1a60ad12080512f8ca SHA-256: 3a53c92850319d5b9884dffa51e264b84002c5e19bc7b542d9a7ca86e29e040a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to 'daycare registration form template word' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility of the malicious link.

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=daycare+registration+form+template+word
    • http://files.mesabikerace.net/uploads/1/3/1/8/131858044/gafomuxe.pdf
    • http://melixip.familypromisegf.org/uploads/1/3/2/7/132740214/wusedul.pdf
    • http://xesixi.vogelsangartwork.com/uploads/1/3/1/1/131163635/3564726.pdf
    • http://mogokoju.nickrichardshq.com/uploads/1/3/1/8/131856772/9140530.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/lumuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/kevuvojal.pdf
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/46298796281.pdf
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/daxamewop.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/50365846683.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/paliroroki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/73187337362.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/milijevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/zisunekefakatarijesevoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/6467/0873/files/broadcast_listener_service.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/general_mathematics_10th_class_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/app_scanner.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_off00007639.bin
5fa8f573aafaee8e1c37163739dc45cb3c2f043c9586b7e9421b94c61dbf045a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 5668 bytes
font_01_sfnt_off00008986.bin
d0d7ad9fe1f3e7775d6629179e70cef95211d73e2b0d8830b6b084254181a7c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8986 10224 bytes

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