Malicious PDF — malware analysis report

Static analysis result for SHA-256 534d600dfbfdb1f7…

MALICIOUS

PDF

43.2 KB Created: 2020-09-01 18:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64bb58cc9b2c4b1865d2d10ca3f7d59b SHA-1: 81bc50f1173fce7d682b634749c61575244cd43d SHA-256: 534d600dfbfdb1f749b871b26f22ccc833db59e56c3963e38d5a8713879a27bc
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.com/wix?keyword=bjj+gi+size+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links pointing to various PDF files hosted on static.usrfiles.com and cdn.shopify.com. The document body is heavily obfuscated and contains remnants of the redirector URL, suggesting the primary purpose is to lure users to malicious sites.

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.com/wix?keyword=bjj+gi+size+guide
    • https://static.usrfiles.com/ugd/74147a_6404bd42480f473d89a57e7fe5ed3968.pdf
    • https://static.usrfiles.com/ugd/696b8a_75352a4e22384c999bc91452cc4e032a.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_300b0e9e24d6413fbedfc2b436ef5c17.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b233d4757c540bca3c746b29c17878a.pdf
    • https://static.usrfiles.com/ugd/cfa91a_b3f2d8d7bd8a4fbfb49e2d8232fc47e9.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/brahmastra_advanced_maths.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/96096184891.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/18131347128.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/dusotigizenad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/manual_de_administracion_de_empresas_senati.pdf
    • https://static.usrfiles.com/ugd/1f5cef_dc6f678340c34ceaacb099e76c07fc44.pdf
    • https://static.usrfiles.com/ugd/b8c837_96d04563b91e43d4904875a785eaa00c.pdf
    • https://static.usrfiles.com/ugd/4c76bf_320bd7b5ae464e1484d1593869cb7b95.pdf
    • https://static.usrfiles.com/ugd/4cf28d_527631e5f39246de986f407ddf562aef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f91.bin
f08f72be7779cd5110db9998b4fce12a6068458d312193b4f5436c3deb194691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 4416 bytes
font_01_sfnt_off00006e9d.bin
f113fc61dab4aef56c2cf464ba265b26cc51e220db227d412d02df95b8c99d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 10368 bytes
font_02_sfnt_off0000920d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920D 4324 bytes

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