Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8d186560ee5d55…

MALICIOUS

PDF

44.6 KB Created: 2020-08-25 06:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adbe31ce8e0cee8731e0644429927188 SHA-1: 77105ed6d1ce1f7e291e894d1cedcbc73f130713 SHA-256: 9d8d186560ee5d55934f74db11e64b0bed659c5f25dddc0403a5e14390dd98fe
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as content related to 'Nintendo ds emulator for android online'. This link, 'https://ttraff.cc/pify?keyword=nintendo+ds+emulator+for+android+online', is designed to lead the user to a malicious site. The PDF also features a link farm pointing to various Shopify-hosted PDFs, with 'https://cdn.shopify.com/s/files/1/0433/6844/8152/files/xopib.pdf' being one of them. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=nintendo+ds+emulator+for+android+online
    • http://fowumad.orsyachtdesign.com/uploads/1/3/1/6/131636725/jokezarudopuje.pdf
    • http://files.shawlegalservices.com/uploads/1/3/0/7/130775245/bujukadebuxe.pdf
    • http://mupuj.howesenglish.com/uploads/1/3/2/3/132302842/5896551.pdf
    • http://files.dreamcatcheralpacas.com/uploads/1/3/0/7/130775732/fawatevabimi.pdf
    • http://files.acsofmichigan.com/uploads/1/3/0/9/130969775/ditoxesojedoxulub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/xopib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/naming_acids_and_bases_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/the_art_of_war_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/black_veil_brides_2014_album.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/netflix_apk_mod_ita_ios.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/sawareragarajogakibojibuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/50867868991.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/mapekutugusuna.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/lixeriguribofiginut.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_off00006fa7.bin
1c9a6070bf5469e7412d09e9067c8c1ec58315c9354e8c8fffc36e9d2fdf8265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA7 5020 bytes
font_01_sfnt_off0000809f.bin
8c3d1806362580ed2088e3cba727ff374ba4e0ec529b073fc8f489ffa23e2ba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809F 10652 bytes

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