Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b202de21b474e1…

MALICIOUS

PDF

51.3 KB Created: 2020-08-09 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e1db51d9f725cf343f2b38aaebc2cf3 SHA-1: 5678277f6b1e5023f73e9bb1f9eda96e5912e00a SHA-256: 54b202de21b474e14884bfb543815bd6d240226b217aa4e559d4f5bc04ee50a9
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to a 'creative teaching and learning resource book pdf'. The presence of multiple embedded PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility of 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.ru/pify?keyword=the+creative+teaching+and+learning+resource+book+pdf
    • http://files.montaupcc.com/uploads/1/3/2/6/132681336/e5249.pdf
    • http://zaxajeni.kwpoole.net/uploads/1/3/0/9/130968921/nobitogejipabumajas.pdf
    • http://pezuzaje.leapcreativeservices.com/uploads/1/3/1/3/131383483/sowevitudibe_jaxulimezime_wesopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/42163731451.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/league_of_angels_fire_raiders_code_redeem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/xokopirufutuwibu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/history_of_vocational_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/1181808065.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/wosig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/minafomabepuriwinawipixet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/wajawejojivomojaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/47916628010.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/rekobetowuviw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/advanced_excel_formulas_for_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/tadoxedakupagasije.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/endoproteza_stawu_biodrowego.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_off00008810.bin
8e9bf7dc5075766cef785be86e3feade34d867319fe74dd74758f1719c39ccde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8810 5628 bytes
font_01_sfnt_off00009b2e.bin
f719ed0e41d1a148a73d2d75307431098a33b6293c2e6e988201a352340390d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2E 10708 bytes

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