Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf7c4738c3f2c28…

MALICIOUS

PDF

39.7 KB Created: 2020-08-06 18:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 683bb5dd15781cdd39199a21d42127ba SHA-1: a1afa7cf48c5dacb7f44ac9c5a0afd0ab4f528f0 SHA-256: abf7c4738c3f2c28181d0c794cf810775a1b4a350631b3aa53b03210ffea7305
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

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=lethal+and+sublethal+genes+pdf
    • http://files.psusdarts.org/uploads/1/3/1/3/131379718/tunawak-bemajira-gisapofiko.pdf
    • http://files.fumctupelo.com/uploads/1/3/0/8/130814529/momurajoba.pdf
    • http://files.inbalancetherapyclinic.com.au/uploads/1/3/0/8/130874050/sawejebawitu_mojixefo_vifanasubumid_xufowebifew.pdf
    • http://files.sworldmusic.com/uploads/1/3/1/3/131383294/kigegekivinuxutare.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/46648887890.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/dajuligu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/kukebifijumagamekajunul.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/12201893415.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/vipel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/absenteeism_rrl.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/38802756290.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/photoshop_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/gapeluvevosavevonegozazaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2472/files/33516533733.pdf
    • https://cdn.shopify.com/s/files/1/0434/1373/3533/files/59834914176.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/82736421486.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/ig_1000_purpose_authority_and_responsibility.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_off00005d5a.bin
82218afdb5d395a7decf7cbb5bd8ec4f83cb94d806fe771f7e2a4ba72f348886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 5288 bytes
font_01_sfnt_off00006f54.bin
ef8a1d9f3cf895de1c4f054051bffeee899ce769f1d96c1f07400c103cd6e7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 10208 bytes

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