Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec8146918538854…

MALICIOUS

PDF

50.9 KB Created: 2020-08-29 19:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53b8f1ec02a44a6ebe9fab8df85be873 SHA-1: 7df401cb74cc7ae5e9f11d57214e0e816944c41b SHA-256: cec8146918538854d816c230470d19512474bb8eb5bf881ac4e158608843c889
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=a+shade+of+vampire+pdf+download'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on 'static.usrfiles.com'. The presence of a visual download button lure further supports the malicious intent. The document body, though heavily obfuscated, contains the same malicious URL and several benign URLs, reinforcing the redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=a+shade+of+vampire+pdf+download
    • https://static.usrfiles.com/ugd/54fa57_7aa6bfe4a5eb4aaca3635a40c02bd4f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_92460ea311c6494fae54c155528fd7d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_43cfc2a5113842e4b04da51788aeff86.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce64934b18b9454eb1cd4b0ec1c38508.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.pdf
    • https://static.usrfiles.com/ugd/b8c837_1eb2cd1c746642c781cc690700c936b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9436f4bf0adf43519e33418329dfb0f1.pdf
    • https://static.usrfiles.com/ugd/10e3af_0cfa53660b0640a49f874a72ae2b2fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb76e93294e649dda410835ba43541f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_356dc075a8df438885c06052ce8c0c88.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2a30a9a72904156b09b47f6b151624a.pdf
    • https://static.usrfiles.com/ugd/b8c837_22b63078c113456380a9961e3a46eb28.pdf
    • https://static.usrfiles.com/ugd/ea2f88_72558d66f00b4e579b41cdb330f6b274.pdf
    • https://static.usrfiles.com/ugd/b8c837_1acef00418f945289c9673f17a98421f.pdf
    • https://static.usrfiles.com/ugd/8de238_0b20ca6572a94647920281d170e5e12c.pdf
    • https://static.usrfiles.com/ugd/83e24f_dfa4abb059c14667b74df19bcd9c071d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4579e7ee784243c0a674461dea26c8ff.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f4.bin
930e7100d3456b7f42de4cc0a151c811f8cda3d6eba19097f4ca200184b7aa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 5132 bytes
font_01_sfnt_off00007842.bin
40b023203db38f6770ce678b0918c38d5842b5355d67a96932241b0bcf34bc7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7842 10180 bytes
font_02_sfnt_off00009b63.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B63 16092 bytes
font_03_sfnt_off0000b02b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB02B 4324 bytes

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