Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7c9b7a4c8003da…

MALICIOUS

PDF

51.4 KB Created: 2020-08-14 08:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e5352bc668093a1299414150b51a20f SHA-1: 899107dfffac4a63013904b5fdf68de819578578 SHA-256: 8f7c9b7a4c8003da460cffcfba13d2fc5e097a835e9643aab9b00588f6c48fe2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=grade%2010%20math%20trigonometry%20worksheets%20pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a PDF link farm heuristic further suggests a tactic to artificially inflate search engine rankings or distribute links. No scripts were extracted from this sample.

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/wb?keyword=grade%2010%20math%20trigonometry%20worksheets%20pdf
    • http://sabij.olbsfamilies.org/uploads/1/3/1/4/131407655/vegikituzejovirosi.pdf
    • http://viluw.aloeverancl.com/uploads/1/3/1/3/131398140/gilarajepa.pdf
    • http://dofediro.louisianaheartgallery.com/uploads/1/3/1/3/131383314/76f4a63d22.pdf
    • http://files.musictostopthepersecution.org/uploads/1/3/2/7/132741081/mopimitenod.pdf
    • http://rafux.purveyorhome.com/uploads/1/3/1/6/131607163/rijivivonol-nugenubu-bulejejud.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/16338595687.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/1898351737.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/sekilav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/dreamweaver_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/3567/2219/files/gefaposage.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/sagenetelawolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/84502382653.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/lorupazumeguv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/buzipanixakutinile.pdf
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/jiresawofegusivagenaxanol.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/52037323703.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dofupuz.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_off00008886.bin
18b3c6089101fce3245716bdda4aa2da4e97d9025bc00f976f880956c6fbdc2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 5908 bytes
font_01_sfnt_off00009ca2.bin
7244150a56648ad540b1acf9fc55a343cb89700aa4eed52d59475f496e360de9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA2 10448 bytes

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