Malicious PDF — malware analysis report

Static analysis result for SHA-256 25638bffb8ebdc39…

MALICIOUS

PDF

37.4 KB Created: 2020-08-08 21:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76e2be03988c7e3de2bd617264a57901 SHA-1: 8096e21cc18c2e380034446b34d1a7eb08bf40c4 SHA-256: 25638bffb8ebdc39dd651e930854a353201d09b5b1db895a898191e7c6216e14
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=advanced+engineering+maths+ka+stroud+pdf', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign Shopify domains but are likely used to obscure the malicious redirector.

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=advanced+engineering+maths+ka+stroud+pdf
    • http://files.plympton-wyomingfair.com/uploads/1/3/0/7/130739061/5a5a2.pdf
    • http://files.take2actorsstudio.com/uploads/1/3/0/8/130814032/f2b1966273.pdf
    • http://files.handmadehill.com/uploads/1/3/1/4/131411688/2034739.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/california_secretary_of_state_entity_number.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/gadawaxaxujizasuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/72243737082.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/wivep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/gizapobalasulilal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/el_alferez_real_eustaquio_palacios.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3336/files/tidusajizaronupadejam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/14706181871.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/jijejaniwupiloxazov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/7863318679.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/13933350724.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_off00005174.bin
b6e0e2b2ce3a0d0061601a2e962e241da747039e004faa2944f32e9f15a795c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5174 5652 bytes
font_01_sfnt_off00006493.bin
05123fa5770e3532468e63862a4f6ce3c05ce36becbc4e687837f187753178ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 10144 bytes

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