Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f8d4e32c85b074…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 05:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80cde6f8bd24d45402d890eeea74c70c SHA-1: 181e120e27a3a55a14bb43976db7eaedaa00910c SHA-256: 43f8d4e32c85b074919099f8d0412069469f3cc93b6583a0fa2d2316813ed24a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'ttraff.cc', a known malicious redirector. The document is disguised as a 'Nespresso magimix user manual' to entice clicks. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt, further indicating malicious intent.

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=nespresso+magimix+user+manual
    • https://static.usrfiles.com/ugd/1a89c8_b06586fee0744b818a5b8e88ec4f191b.pdf
    • https://static.usrfiles.com/ugd/e32576_629d283720a749c784c05c0b1c3dadca.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_eb0b84b173974c42b3f10535824aa555.pdf
    • https://static.usrfiles.com/ugd/735424_2452f12890984cc5a2b7490e92f02a44.pdf
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/gordis_epidemiologia_5ta_edicion_gratis.pdf
    • https://static.usrfiles.com/ugd/9904c2_437a65e2135d465983a125af2d9e090a.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fd662ccaa04630affd15a124454021.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3adabb3da63441b94fc10baf91845ec.pdf
    • https://static.usrfiles.com/ugd/3b0c81_b9450120936549f7841dd32bc72ff478.pdf
    • https://static.usrfiles.com/ugd/7f46b5_eb748494eb1d4bdda00c4afd201bb4fe.pdf
    • https://static.usrfiles.com/ugd/de02f3_aba7acd174f9437aa75c7a26af357208.pdf
    • https://static.usrfiles.com/ugd/aef5b7_a2e24bbdfbf64c72a3581e3e0c2ed099.pdf
    • https://static.usrfiles.com/ugd/cfa91a_ad483a9611c5431aa616cc3a68506340.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_off00006218.bin
de31b3f49810b3545a08fa87956226218fdbe0c5d296f90abb422d050b93a906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5176 bytes
font_01_sfnt_off000073a8.bin
54e1f10e4c8eca6366c3ae0731aa676e482d74ac1c1d1d4b298e4464da018314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 10340 bytes

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