Malicious PDF — malware analysis report

Static analysis result for SHA-256 99806ab93e474e7c…

MALICIOUS

PDF

59.0 KB Created: 2020-08-01 19:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa0655ed4cbdeebccd4fa6f9240a5234 SHA-1: 630144e7e7f611f989584debd7e77e314a564439 SHA-256: 99806ab93e474e7ce44d30b7a63db8cfb29beb736b5a17f0c82f8963b090185b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the ultimate destination of the malicious payload. The presence of many Shopify-hosted PDF links suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=albuquerque+tv+guide
    • http://files.cedarhillsoaps.com/uploads/1/3/0/7/130776015/dujewopuwiloj_xewizozaxudoja_xuvexi.pdf
    • http://files.laramiebikenet.org/uploads/1/3/2/6/132681954/monezewerikogikir.pdf
    • http://files.pipandwillys.com/uploads/1/3/0/7/130740177/271856abf620d.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/gogakalavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/taginamefanud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/xewojemura.pdf
    • https://cdn.shopify.com/s/files/1/0430/5233/5255/files/54225776182.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/61533929580.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/84381115573.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/wokaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/kilevagox.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/xenemetaposemanifezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/64968704925.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/kovusix.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/nuzutiditoxavoxem.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_off00009e1c.bin
0929987fcad3aa05267f76ede0d7a47d9b2a4372fd63482e3f68c73e1b96b58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1C 4920 bytes
font_01_sfnt_off0000aee5.bin
8aa5a9fdc9ad32edeb41d1d9db6f46d9a5d80f1e3a474478387e807835977233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE5 15684 bytes

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