Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbe1cdba95e3e02…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 23:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e42571e50f990dbc08b2ee54d18cd6 SHA-1: 39947b613f65b2238c5be4cf4c7913dbefccf4f0 SHA-256: 3cbe1cdba95e3e029e6ea68921a23dd7eeee336846f6469fe4dce72ff13b7cd9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, found in the document body, redirects to a malicious domain (ttraff.cc) which is likely used for further malicious redirection or phishing. The document's content and structure suggest a social engineering lure, possibly for credential harvesting or malware delivery.

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=lettre+de+motivation+audit+mazars
    • https://static.usrfiles.com/ugd/b8c837_bd1a8274c51f454a8fef573f351975b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe7949643807437c89404e23c6aef9fe.pdf
    • https://static.usrfiles.com/ugd/24853a_5441c3bb4e224354b044d031274f384c.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/ultimate_trolling_gui_by_pristh_and_azurez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7086/files/36199009819.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/38582798233.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/guiseley_primary_school_uniform.pdf
    • https://static.usrfiles.com/ugd/b8c837_6306d4687c3c4a578dde4cccd543affb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7547b62a960b4f7ba97de62b12829a1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1d2c020d34c41ef80471d436125ba5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fc6c97f93bc4691a976cd63338b8b70.pdf
    • https://static.usrfiles.com/ugd/db1da1_adc8b15ba03c4135a3344d27e46a4fbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae1a318ed707480780e7c1d766f775bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9fe9742dad456c8961b1dc3fe4173d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba385a38c96a47f6959ba425c99e3d8d.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_off00005d62.bin
a320fec3ef4cf0c9d7ccc6efa48042aa019dede8ce7b6223c1d59140502a831d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D62 4988 bytes
font_01_sfnt_off00006e51.bin
86469fa81c0eb24f9b2cd0e8b8b187a5db06d87a3b13a111bb7ba3e55fb335f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 11988 bytes

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