Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca36fb1a6f4bbed…

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 08:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca094677f31a52d2a2b8b50944c7e20 SHA-1: cc7cf787ff4412b124a2c88fb293997f0c705dd5 SHA-256: 9ca36fb1a6f4bbed5887ec11e70f534f281ea415a3f5719397ea9de23890a1ca
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=canada+visa+information+in+trinidad+and+tobago'. This URL is embedded within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=canada+visa+information+in+trinidad+and+tobago
    • https://static.usrfiles.com/ugd/6c98bc_0e4e3e4825b0450a85cafd6228f52a16.pdf
    • https://static.usrfiles.com/ugd/33a16d_27098e5bbb4f4715b3f49b08590fc5fc.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_13923b2938dc44119203e46b488b24d7.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/xitatexa.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fdf14fbccdf47169eb3b1d1f1c95a63.pdf
    • https://static.usrfiles.com/ugd/c63dba_c17f14ad7a114f40b718f51ca6539756.pdf
    • https://static.usrfiles.com/ugd/8ab72e_14e2dbd868d044d386b9d3450c6fe039.pdf
    • https://static.usrfiles.com/ugd/b8c837_c773afb0a1c040b3abcb07471c7f7c08.pdf
    • https://static.usrfiles.com/ugd/5ad03d_75e9612cec764996a32040c5e84c366e.pdf
    • https://static.usrfiles.com/ugd/909b15_6ab430abe4f24eeb9814f4d15143dad4.pdf
    • https://static.usrfiles.com/ugd/38bf1f_448346a0c6774dfd8814bf73ffe798c3.pdf
    • https://static.usrfiles.com/ugd/238140_4f7edf918f484a1ea800abc81d0939ec.pdf
    • https://static.usrfiles.com/ugd/2074c9_ba2f6ddc64df478393839629371dc2c7.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_off00005dbe.bin
e5d589f139b98f77878fa688fe882012d1fbb85cefda3fc81b16330c56dad940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBE 5300 bytes
font_01_sfnt_off00006fb6.bin
5cd7d0622202198d9850acb1a2dff1dacdf84738f74c006db9c42879ab5999eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 10108 bytes

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