Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de72243b7ef1b9b…

MALICIOUS

PDF

49.1 KB Created: 2020-08-21 06:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549de90fc191e36fc02f73d3618faf6d SHA-1: 4456294057ca963c63c1fbfa964e594b759c3ed4 SHA-256: 0de72243b7ef1b9b25a71428634bd172651c466bf7d5165eb771b24a10a3a223
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the same malicious URL and several benign-looking URLs hosted on Shopify, likely to appear legitimate. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=chutes+and+ladders+board+game+template
    • http://files.spiritofthewater.org/uploads/1/3/1/4/131453432/fibotezen.pdf
    • http://vagonu.roxandree.com/uploads/1/3/0/9/130969723/73979ffe4cef85.pdf
    • http://wikuvodi.kodecoon.com/uploads/1/3/1/3/131398101/50d7fa2bb2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/a_escrava_isaura_bernardo_guimaraes.pdf
    • https://cdn.shopify.com/s/files/1/0447/2664/8985/files/stay_hungry_stay_foolish_online_reading.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/xezimegugovukotezalako.pdf
    • https://cdn.shopify.com/s/files/1/0441/3590/7480/files/4277939269.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/fawuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/report_hooning_victoria.pdf
    • https://cdn.shopify.com/s/files/1/0440/6552/1814/files/63314027391.pdf
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/semipuxelis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/lozaxetuzepuratexar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1752/files/vepivonu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/ravumazonememorofakuvam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78394199391.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/fumipedimugabojika.pdf
    • https://cdn.shopify.com/s/files/1/0432/3098/6400/files/cute_writer.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cfc.bin
7b6f235e26aebefaf0138be04b4944ccbe11cb0530ed956814f25666dcb1014e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 5416 bytes
font_01_sfnt_off00007f25.bin
6bd2a392fb88a43552867acadf39819231f3cca58008cc0ef64d68f77f615e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 10288 bytes
font_02_sfnt_off0000a255.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA255 16092 bytes

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