Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea05ad4931fc4282…

MALICIOUS

PDF

67.2 KB Created: 2020-08-19 00:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4a4190952040fe48601ed23c695f45 SHA-1: c2ade6528fb8236056c3fe869093af63a231ad25 SHA-256: ea05ad4931fc4282b62252f17010b96662b56456ffd2b5aa9b78bc792f251a23
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. The PDF also features a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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=chest+guidelines+vte+prophylaxis+2016
    • http://files.rootedlifecoach.com/uploads/1/3/1/4/131409024/fejixodew-tusakojuwinojid.pdf
    • http://files.en.lflplatform.net/uploads/1/3/1/4/131405951/fukugetazujed.pdf
    • http://files.rethanksaz.com/uploads/1/3/1/4/131453725/9627265.pdf
    • http://rorapop.imakepossible.org/uploads/1/3/1/4/131483154/wezaxub_vagumujutug.pdf
    • http://files.austinartists71west.com/uploads/1/3/1/4/131407952/5120098.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/tejawujibu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/zakanobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/booty_band_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/batman_hush_comic.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/12519659444.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/nitro_pro_to_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/95691415262.pdf
    • https://cdn.shopify.com/s/files/1/0435/2491/5359/files/34068727307.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/wozikaxezakewubilovirani.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_off0000c762.bin
fa0cab73dded5bfca0f013828f6f5486b262e1dae29edafd854da579b89dcc91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC762 5836 bytes
font_01_sfnt_off0000db42.bin
6e0d3a6a0ba5308acb553dc736ec644472f002f834249d2d3c36546502294331		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB42 11232 bytes

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