Malicious PDF — malware analysis report

Static analysis result for SHA-256 da25a7d0cedf0cff…

MALICIOUS

PDF

56.7 KB Created: 2020-07-31 03:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794764a3f2015d4ba65160dde1be0589 SHA-1: 33719b90fabfc68ec80f812523f0a4c546c823eb SHA-256: da25a7d0cedf0cffd6b5afe75b81185a68843d61e14c0d56d0b5214b69015865
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with heuristics indicating it's a link farm likely used for SEO manipulation or to redirect users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector suggest a delivery mechanism for further malicious activity.

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/pify?keyword=different+breeds+of+cattle+and+their+characteristics+pdf
    • http://files.domowilliamsburg.com/uploads/1/3/0/8/130874658/kakibofaxe.pdf
    • http://files.theglassforeststudio.com/uploads/1/3/0/8/130874063/831593fbd.pdf
    • http://files.poncecapitalpartners.com/uploads/1/3/0/9/130969825/pipux.pdf
    • http://files.physio-on-the-go.com/uploads/1/3/0/7/130776167/vobotozobo_jonogovapeg_rufomew_korawovuj.pdf
    • http://files.kaiserdanes.com/uploads/1/3/1/4/131454549/fedf202977.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/mirumivasuxasisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/xezagepamofozixojewugom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/71375506138.pdf
    • https://cdn.shopify.com/s/files/1/0435/9965/9176/files/mikigotabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/xarosavulasazizove.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/minotoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/15749888.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/gagobofitatuwedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/40229411351.pdf
    • https://cdn.shopify.com/s/files/1/0438/6524/3803/files/74936632319.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/jebudutigovem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/wadalimewowim.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/49482037512.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/7736284020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/92887131934.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_off0000a01c.bin
39bfe87fd32526dce45c8131cd7f04bf64da03dfe7f9cc2c4ec127a4500a4a22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA01C 5172 bytes
font_01_sfnt_off0000b1a4.bin
14cf8da679932d7450c3ed66a546ef5e62bee88418def8abddf2d095225c8491		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A4 10196 bytes

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