Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4066352f224b4d1…

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 23:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2ee3762d1fe82d8ce6557380481cd2 SHA-1: 345a1e5b8149534b399a625c69a227388827ca09 SHA-256: e4066352f224b4d193d6d7feec77f4f74a9758c64c212e5ba5b377ca64643f21
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sustained+attention+worksheets+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring the user to click on the malicious link, which likely leads to a phishing page or malware download.

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=sustained+attention+worksheets+pdf
    • http://files.aedpresearch.com/uploads/1/3/1/0/131070367/6508767.pdf
    • http://files.chen-lu.co/uploads/1/3/0/7/130775980/ralutu.pdf
    • http://xefopu.charlenemosley.com/uploads/1/3/1/4/131438044/naxililer_remepavukuvate_jimigojovuke.pdf
    • http://watopas.maoriart.org/uploads/1/3/0/7/130739415/4695800.pdf
    • https://cdn.shopify.com/s/files/1/0438/1874/6013/files/mowogogasubunometebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/ahrq_guidelines_for_pressure_ulcers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/m2ts_to_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/4229/8264/files/cd_ripper_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/tuvulus.pdf
    • https://cdn.shopify.com/s/files/1/0428/8361/2831/files/puxikesowuxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9107/files/baixar_whatsapp_apk_colorido.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/73959088644.pdf
    • https://cdn.shopify.com/s/files/1/0451/6010/4090/files/sugomezelofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/bdo_berserker_gear_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/wall_of_force_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/pabamuviruxujijejov.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_off00006622.bin
86bf5203cacb6c47dca84f7f4ac961aec443b341c16b3a7b42dd878cbfb02766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6622 5356 bytes
font_01_sfnt_off0000785d.bin
6cfe04f3a64514d9840cdf1116cdaec12fe6eca7bb0ba6da8ea24404fda66825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785D 10260 bytes

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