Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91875fb1de88edc…

MALICIOUS

PDF

33.5 KB Created: 2020-08-30 10:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e227c8cd0e8c1c2ca26ec5d93fa5de2 SHA-1: 066f8b38c032dcce0b7862c253b9103018181791 SHA-256: b91875fb1de88edc155cfce6b696391f4064d9263763cc83600e0e9c13f7ad84
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 points to 'https://ttraff.cc/wix?keyword=nts+analytical+reasoning+questions+and+answers+pdf'. The document body, though heavily obfuscated, appears to contain references to the same URL and a large number of other PDF links, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely intended to redirect the user to a malicious site or download further malware.

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=nts+analytical+reasoning+questions+and+answers+pdf
    • https://static.usrfiles.com/ugd/b8c837_c925f738a49d44788c5f180e92f1ebea.pdf
    • https://static.usrfiles.com/ugd/b8c837_90e518543667433cbb1d34ab83fc318a.pdf
    • https://static.usrfiles.com/ugd/b8c837_15c531199c8e43b4894682af5ee4000d.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/fabijawejulowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/juburabobulujidoxu.pdf
    • https://static.usrfiles.com/ugd/b8c837_7127d8f3ec504dcd951e193db3d26c66.pdf
    • https://static.usrfiles.com/ugd/b8c837_b86fc6a0cc2e4ac1b1401b20b6f5d320.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/69598426968.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/50355631513.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/baxi_combi_boiler_instant_105e_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/37530911026.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_off00004380.bin
a6b0aa142b189d1f76863376b9d23f72348fe849aead9420d0a0f0dffd9347c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4380 5612 bytes
font_01_sfnt_off000056b8.bin
a3d7c66bc6fb31b3717dc34ccd38f5b980b397d5a822e594a78e81e6470a2ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B8 10196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.