Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac075e540a752531…

MALICIOUS

PDF

48.3 KB Created: 2020-08-14 08:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e458266ae9969b094b998b4ca729a01 SHA-1: 3e09ceb87eb618d7c8601f0b2f7a921599914e9e SHA-256: ac075e540a75253113a25ab4bb709b6cf739ff4be285aed225e2ab77c487baea
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to drive traffic to potentially harmful websites.

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=obstructive+sleep+apnoea+nice+guidelines
    • http://mubazored.csma-medassist.org/uploads/1/3/1/6/131637814/914975.pdf
    • http://zaron.srphotodesign.com/uploads/1/3/1/8/131871486/subafurugejiko-zuluriluju-pobofema-golek.pdf
    • http://files.lauriebmorse.com/uploads/1/3/0/7/130775808/sapedodimugiregi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/bollyshare._com_new_movie.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/judonowutaguto.pdf
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/adelaide_showbag_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/bewitched_movie_cast.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/xmlhttprequest_post_example.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/bmw_warning_signs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/45204764406.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/bosasofisufaxukajesipif.pdf
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/ender_3_stepper_motor_specs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/jemokibulixefugog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/91141794294.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/malupez.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_off00007e25.bin
02d64050685603a5438ef16f16dd1917d9302c6e855173070209aa1763f7d9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E25 5468 bytes
font_01_sfnt_off000090c3.bin
3e2fbd864d7207b2acdabc3f1960286d435026de861d7d2dfe5d682268e4a617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C3 10500 bytes

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