Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c1ba68d2ae0cc2…

MALICIOUS

PDF

39.3 KB Created: 2020-09-06 08:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b5b67f586ae85eb231d3606ad8f95c8 SHA-1: d5a74bfd4c35d5b7072b9cf883d4b615edb90153 SHA-256: d3c1ba68d2ae0cc2246f75f18805cb2b5a6cac9928d1730c1b69af0087c84166
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=blumatica+sicurezza+formazione'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL and references to 'blumatica sicurezza formazione', suggesting a lure for users interested in that topic.

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.me/wix?keyword=blumatica+sicurezza+formazione
    • https://static.usrfiles.com/ugd/e5a943_d3f5662d8cfe425494c6b56d39640c2d.pdf
    • https://static.usrfiles.com/ugd/4bb103_33459c4f43f8446e83d615d8e4243736.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_4ab7fa8c52774d57bde50e75dc07214f.pdf
    • https://static.usrfiles.com/ugd/d1c05f_c671652de23c4d118c48f75f1debc55d.pdf
    • https://static.usrfiles.com/ugd/f67134_bb7c26960e464ce791aa0c315b1c66f9.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_dc8be2851f9e45b88fc5c21c62fa37f4.pdf
    • https://static.usrfiles.com/ugd/bba345_307bd7c81b824454ac5129d8ab9e20f7.pdf
    • https://static.usrfiles.com/ugd/a0d21a_5e8b468bef724bc0a78b443d425f326f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbd3c4a973d4b1e9c0ac76c9a720fcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c2275576d54cdbb059520f99d8ca0a.pdf
    • https://static.usrfiles.com/ugd/ae15ca_3fee062838a642c4bbaf08d76c62c7dc.pdf
    • https://static.usrfiles.com/ugd/70094d_fb3285a17c2f4480a38b3cf4975241ef.pdf
    • https://static.usrfiles.com/ugd/6f53d7_994ca64764094918af0e623f1ed7e9d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_86773f71f9834cca8f6697a234a46b54.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_off00005a3d.bin
23781015748d92411e4b7df409bdcb1be17a489b816697c2598bed476cd2a716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3D 5128 bytes
font_01_sfnt_off00006b9b.bin
cb16f0f6a89ace170a4327b1778cea74bd1043b7816fd303d520f43e788ec3c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9B 11212 bytes

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