Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef6eeef63771fdd…

MALICIOUS

PDF

37.3 KB Created: 2020-09-08 15:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001e8439d5b1ae5889b410b815c70a71 SHA-1: f746b318244ad29e367e7e2ae1c3470ba1d4af9e SHA-256: bef6eeef63771fdd7b7c0ca6f8f813b45f179a08c608debf7dedc7faf6a3c21d
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a birth certificate template. This suggests a phishing attempt to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious. 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=birth+certificate+template+fill+out+online
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/lord_byron_she_walks_in_beauty_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/adding_and_subtracting_decimals_worksheets_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/wefeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/vakotuwagizenapowugi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4346/1032/files/vobamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/28874457214.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/15751801603.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/wazikukamidogizoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/zaluwavuguboxopevafak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0457/6814/7110/files/los_12_articulos_del_credo_catolico.pdf
    • https://cdn.shopify.com/s/files/1/0435/9284/3422/files/come_down_o_love_divine_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/allis_chalmers_wd45_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/56617349921.pdf
    • https://cdn.shopify.com/s/files/1/0465/7718/9031/files/38109352973.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_off000055a7.bin
578b8943411895a886c3b4ee91bb6bb220697ec064d6d819302cff4e59755b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A7 5128 bytes
font_01_sfnt_off000066f3.bin
3a9ffcb70ed0edfa76b6e7ff1ecdbade801a42fe9f8f959ed452dd3d4d48eb3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 9796 bytes

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