Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c71ffc4a8b0743b…

MALICIOUS

PDF

37.7 KB Created: 2020-08-26 12:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9697289087efa267baf810934921dd16 SHA-1: de266b24bdec8df900b076e48641a65d31889df4 SHA-256: 8c71ffc4a8b0743b64e3ef44a4ca7eb769be26ab0dc51abe0b62127d766c6a58
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=barron%2527s+ap+spanish+language+and+cul'. This indicates the document's primary purpose is to lure users to this malicious URL. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO manipulation effort to distribute malicious content. No scripts were extracted from this sample.

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=barron%2527s+ap+spanish+language+and+cul
    • http://files.marinamarinaantiques.com/uploads/1/3/1/4/131483154/4964168.pdf
    • http://jewurexim.brewstockonlinestore.com/uploads/1/3/1/6/131606577/5196306.pdf
    • http://files.claridgechang.net/uploads/1/3/0/7/130740438/fewer.pdf
    • http://files.powerupk9.com/uploads/1/3/1/4/131483282/kuwelor.pdf
    • http://files.colleenbardelli.com/uploads/1/3/1/8/131856065/gijomagez.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5222/files/48712287922.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/mukejobex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/vuwowenixumulukaboxusofo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/how_to_hide_api_key_in_github.pdf
    • https://cdn.shopify.com/s/files/1/0447/9890/2438/files/sufisofoloba.pdf
    • https://cdn.shopify.com/s/files/1/0432/1804/3040/files/mejokapereba.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/29134493506.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/kufesajewutunovod.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/calendar_app_for_couples_android_and_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/84736427009.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/naxapalol.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_off00005489.bin
2e529827d5d2dc9cf0c8af2bc800f9d19425880b00987afa794b17939bc678bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5489 5420 bytes
font_01_sfnt_off000066ed.bin
8e03f48c7467f06c028ff39f371fe2d8c7ca0bac36f2877cc4429b2b1c425202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 10260 bytes

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