Malicious PDF — malware analysis report

Static analysis result for SHA-256 f793b16a43b727e2…

MALICIOUS

PDF

59.8 KB Created: 2020-08-18 19:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b12da5db6a693ba2c3e676645c0418c1 SHA-1: 54ac59a7c07cac48e9dfe4fe47b361948d6e76ef SHA-256: f793b16a43b727e27bbcd0096ff43df403d759bacc2a485cdd63efaa1ce47e49
150 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Samsung note 10 hd wallpaper' and a URL that appears to be part of a link farm designed to attract search engine traffic. This suggests a phishing or malware distribution lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=samsung+note+10+hd+wallpaper
    • http://files.precisionartstudio.com/uploads/1/3/2/3/132302870/roxokonopasuj.pdf
    • http://files.dogswagco.com/uploads/1/3/0/7/130775607/3213371.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/77211447560.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/kimenufenatewisil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/xorekukoluwusapixulinitip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/rejorilisetod.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/73895914011.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/76516963053.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/roman_catholic_telugu_bible.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/54190035449.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/35211758325.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/tujivani.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/jamadefodenazu.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_off0000aa9f.bin
7595075e3a9685d4243ea6bc3d5d9071273e79bdc3b149159184bfaf3bab81cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9F 5764 bytes
font_01_sfnt_off0000be20.bin
157daf1c7c05733851bc2bf9edbd5fe9aa2f9ca3c90adf4f80b9f3cf406993b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE20 10620 bytes

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