Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f7049ff99ab246…

MALICIOUS

PDF

45.2 KB Created: 2020-09-09 03:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01beeb49a0bc5a70d69c4ee50fda804d SHA-1: 7ca900852eeb0504bd8c914a35c6d798447403e7 SHA-256: e5f7049ff99ab246eb5eb42cd161e70189bccf38746eba3639adccb14bf79bdb
152 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, a technique often used for SEO manipulation or to host malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=ubiquiti+networks+uap-+ac-+lite+manuale', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. 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=ubiquiti+networks+uap-+ac-+lite+manuale
    • https://static.usrfiles.com/ugd/941881_04cbf06fd15b4cbba988f9e8a634288a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad074537707482d9ef2dda3d167778b.pdf
    • https://static.usrfiles.com/ugd/9ef0c3_aab163c8d905460e8dfa148ff5884019.pdf
    • https://static.usrfiles.com/ugd/bdc04d_f4494aa4e84e4d14bae5bf8098fbcd56.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/simple_past_tense_exercises_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0453/9475/5752/files/kanotasiligika.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/44880118091.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/soginuzizipafo.pdf
    • https://static.usrfiles.com/ugd/b910ae_0cb4bbaa55444a5981500fe98bd120c8.pdf
    • https://static.usrfiles.com/ugd/5bb01c_c8506cc7d63a44fbb9a647da809fcec2.pdf
    • https://static.usrfiles.com/ugd/aef5b7_644b26108a2f43daa6e879a435209d8e.pdf
    • https://static.usrfiles.com/ugd/8aba0c_4925c9007f5549d29bcfe0fda262fa8c.pdf
    • https://static.usrfiles.com/ugd/20d83a_6c27af61a15044828bb2d665e2924039.pdf
    • https://static.usrfiles.com/ugd/23924c_588aea90f2b843489076fbbe434913f1.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_off00006524.bin
e9d94465f3fca6871f77967111e3b21e5cf4783f18392751b643175110d35645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5524 bytes
font_01_sfnt_off000077fe.bin
66037ec82edcf05af763c1f189b69dc457de8f2fb1cf61e7c86ffba4c2c5dc29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FE 15520 bytes

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