Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbb0e3823c5efae…

MALICIOUS

PDF

35.3 KB Created: 2020-08-30 08:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbddd7cac5c4268c1052549f4d58e61 SHA-1: 870652c2a0d87b62a54e6d4b6470a1c2b2feaef0 SHA-256: 2fbb0e3823c5efae83e448476e34632a8319bcb82b8b291e855b96aab65dcba4
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, disguised with a lure related to 'Juego de tronos temporada 7 online'. The ML classifier strongly supports maliciousness. No scripts were extracted, but the PDF structure and embedded links are sufficient to indicate a malicious redirection attempt.

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/wix?keyword=juego+de+tronos+temporada+7+online+l
    • https://static.usrfiles.com/ugd/b8c837_71f4be44241b45b68bab2a20aba7559c.pdf
    • https://static.usrfiles.com/ugd/fd3290_90b829c47e98438a9e46638023b6454a.pdf
    • https://static.usrfiles.com/ugd/dd4472_88629f6b37534008b72791b4bb77d539.pdf
    • https://static.usrfiles.com/ugd/f515ca_8f8be6f0e36542789e1b3d62363664af.pdf
    • https://cdn.shopify.com/s/files/1/0452/4238/4545/files/29149124342.pdf
    • https://cdn.shopify.com/s/files/1/0464/7914/7176/files/7826721157.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/pensamiento_racional_e_irracional.pdf
    • https://static.usrfiles.com/ugd/b3bc21_78dae41bfab44edf8462975f34b6ffdf.pdf
    • https://static.usrfiles.com/ugd/493135_622be861f2fc4872818ded30a5c879b6.pdf
    • https://static.usrfiles.com/ugd/565485_35ebfb8820e740b1a7409b3de3c1a8f2.pdf
    • https://static.usrfiles.com/ugd/97493d_a8ebba2f5f96479b9e7dd99e2f9868d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_60c32697e40e47429aa316643a28fa53.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/40185924167.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/surirabaturiraxanon.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_off0000499e.bin
0627a51596d54fbf094124571e2248848bd66e6c21773414fdd9dbd1503193fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x499E 5348 bytes
font_01_sfnt_off00005baf.bin
122deb2236ffde564ae4c2f2e282bb5e7bc7116af29d464ebf6e83f237d5d6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAF 10780 bytes

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