Malicious PDF — malware analysis report

Static analysis result for SHA-256 f963bac0f9faa883…

MALICIOUS

PDF

38.7 KB Created: 2020-09-01 19:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd7cc5c6e14790c38214c72f6f71a4d9 SHA-1: 65fda51f0e6fdb5521c3a37c448eb03cc38f0341 SHA-256: f963bac0f9faa883acf7c0bc256d991a940a40e21ff89de5fdbe556160cc01d8
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific URL pointing to a redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'contingency fee agreement template uk' and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious content. The SE_INVOICE_LURE heuristic further supports the idea of a deceptive document.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/wix?keyword=contingency+fee+agreement+template+uk
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/havana_camila_cabello_ringtone_free.pdf
    • https://cdn.shopify.com/s/files/1/0464/6846/4790/files/avatar_2009_full_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/vobefazitavodulalitosez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/wedapofaruretubapikotajob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3034/files/an_introduction_to_error_analysis_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/47949504758.pdf
    • https://static.usrfiles.com/ugd/aef5b7_0bd1dd5a106b4d148f139d88e5027c0c.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_2ea9a3709e684617bf793f3e70fb0b95.pdf
    • https://static.usrfiles.com/ugd/b5aed9_8349160dcca745d2af4b32f4205be345.pdf
    • https://static.usrfiles.com/ugd/5bb01c_931df8c2fc164758bc22dff1e895e7bb.pdf
    • https://static.usrfiles.com/ugd/c3f88d_bf6e5caedc7946e6a90fd611f45f43b9.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_off0000591d.bin
5e3afb06ce3293dd8e3ef390edabc45081714d41ff02cd7349186f58cbe1419c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591D 5228 bytes
font_01_sfnt_off00006ae4.bin
e2f331c8d1189e6e6aac7610ac7cf5126c37567153463cfd50a2983bfd61b79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 10396 bytes

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