Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af838db25f81802…

MALICIOUS

PDF

173.3 KB Created: 2020-08-03 06:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a468abc984f7b818fde28531340d27c9 SHA-1: a02b3b7155bcb7dbc1bac3955c5c7c1489a211da SHA-256: 2af838db25f818025a00498e0e1e6d957589cd502556172708d9f1659d20c9c4
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, 'https://ttraff.cc/pify?keyword=digital+image+processing+gonzalez+3rd+edition+pdf', is presented in a way that suggests it is a link to a digital image processing textbook, likely to trick the user into clicking it. 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 2

  • 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.
  • 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=digital+image+processing+gonzalez+3rd+edition+pdf
    • http://files.caralarmandradio.com/uploads/1/3/1/6/131606730/658754.pdf
    • http://files.mythematics.org/uploads/1/3/1/4/131452841/sikag.pdf
    • http://files.pacorriedale.com/uploads/1/3/2/6/132696117/lobafojamizet.pdf
    • http://files.medicinemakermama.org/uploads/1/3/0/8/130874257/508209.pdf
    • http://files.emilycarewwoodard.com/uploads/1/3/2/6/132683017/tobumekotimapimer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0941/7127/files/1322531010.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/48449079607.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/address_in_usa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/zasutifibivawetu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/52205584047.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/xiwisososet.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/94856838685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/petofosugitarofugilegofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79894841610.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/dungeons_and_dragons_3._5_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/wezamunelaramozata.pdf
    • https://cdn.shopify.com/s/files/1/0432/9553/9368/files/57353591636.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_off00027071.bin
f52b9ca10dbe687a8ee63b338ea63b24d6ca55def14708c6a7002f7bcecddb00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27071 5688 bytes
font_01_sfnt_off000283c5.bin
397878b73aaa82b5f6207abf6f36bce74663ae0a5d1b2432d2d6f87fbcef4ca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283C5 10304 bytes

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