Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad08c183a628a7c5…

MALICIOUS

PDF

66.2 KB Created: 2020-08-06 14:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ecb8c0eb650f7b1d122d8745a870f37 SHA-1: 09f07efd849bcf5ad060874d5a8cb1816763395e SHA-256: ad08c183a628a7c5604e335f92fb989e24922880d6201ea0aa00052b2ec842d4
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that are part of a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to an 'answer key' and the malicious URL itself, suggesting a lure to trick users into clicking. The primary attack pattern involves redirecting users to malicious infrastructure via a seemingly benign document.

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=intermediate+market+leader+3rd+edition+answer+key+pdf
    • http://files.frechettefarms.com/uploads/1/3/0/7/130775245/196952.pdf
    • http://files.whitneyswings.com/uploads/1/3/1/3/131397946/c47eaab9502a5.pdf
    • http://sotupip.sweetbabyo.com/uploads/1/3/1/4/131407406/dazimegopakomopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/7582042268.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/sexozogenule.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/jagabomixerinimozige.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/jukobinifonolixepuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/66062473263.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/kunaxafona.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/18241221828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/xalemefumikewekuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/zokerixirupojomuvam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1014/files/67245986798.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/mechanism_of_synaptic_transmission.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_off0000bb46.bin
b799bca978753d7b77cecc30311c5d5cf506a6055d57b969859b8b5bd6d199a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB46 5548 bytes
font_01_sfnt_off0000ce2a.bin
75a13ea3098c4b7073948eccaf7084d6a726c7c0a30c840629dce0c4a5bc4ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 14116 bytes

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