Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b57209acaa86c0…

MALICIOUS

PDF

42.7 KB Created: 2020-09-14 10:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41012f247fe2bf571506820cccc158b0 SHA-1: 341c2e389ffae2c61d7c04dd0f128f77e0127f8d SHA-256: d9b57209acaa86c05deb574dfe2a9e4a9627059ecd10cf224b59ed00e0c04737
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'tv listings grand rapids mn'. The presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicates that this document is designed to redirect users to malicious infrastructure. The SE_URGENCY_LURE heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.club/wix?keyword=tv+listings+grand+rapids+mn
    • https://static.usrfiles.com/ugd/b97cba_c491a974206a43be9d85421d964da3c6.pdf
    • https://static.usrfiles.com/ugd/843280_b548ca64da964b98ad179c6d2196f76b.pdf
    • https://static.usrfiles.com/ugd/3fc21f_62578f3a92284bb8896554e9c8b657ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2931eb0f4b647fc8cead60f5e2cafda.pdf
    • https://static.usrfiles.com/ugd/76b6de_093ae0b5ecae4402bbe24d24c9c09c7a.pdf
    • https://static.usrfiles.com/ugd/108936_9bd5828dbea4450791a20bb32deda09e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://static.usrfiles.com/ugd/d79848_e39ec65a563b4d5cba2e78d96bb06ce3.pdf
    • https://static.usrfiles.com/ugd/bf57b5_4aa6248792324001887d9a0189efb355.pdf
    • https://static.usrfiles.com/ugd/8d0191_639e929748124155b27846b23f140561.pdf
    • https://static.usrfiles.com/ugd/4826f5_1a2dd357f17747569f43231e984a8ee8.pdf
    • https://static.usrfiles.com/ugd/cfa91a_06bd61835adb40a69ef4985579dea851.pdf
    • https://static.usrfiles.com/ugd/3be48b_1891872a99c34492973fc7078d5da5d3.pdf
    • https://static.usrfiles.com/ugd/87fdc7_4d2c00502cbc42d2b27306080924b41a.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/96132763749.pdf
    • https://cdn.shopify.com/s/files/1/0431/4955/7917/files/forming_ionic_compounds_worksheet_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/gametogenesis_articulo.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_off00006806.bin
5c0f048e0a7f86913c2646a312044a8a25b8c7a57181e2c0637b23723334bba1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 5288 bytes
font_01_sfnt_off000079f3.bin
644f0127e5f4ef0edab527c94059d556fad2c4f4c3b63a8b8bf2c49f90079e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F3 10036 bytes