Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9cf481e228d561…

MALICIOUS

PDF

45.6 KB Created: 2020-09-06 19:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c188f59485a5fc32f87c57c969e043 SHA-1: f6f30ab7b3efb07941d774168e2ec955cc4949a6 SHA-256: ee9cf481e228d5619f7db45ca7e4c0840082e23c3c78ae7899686ac33bb9d747
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a malicious domain, disguised as a solution to a word problem. This is a common social engineering tactic to trick users into visiting malicious sites. The PDF also contains a large number of links to external PDFs, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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.link/pify?keyword=answer+to+any+word+problem
    • https://static.usrfiles.com/ugd/115d6e_fff784f823944b4a9638b6d8c37cc85f.pdf
    • https://static.usrfiles.com/ugd/5a4aad_c11774b75e094bdfb3c52ef8d1b47f71.pdf
    • https://static.usrfiles.com/ugd/880a7e_952e432d47ae4632b4b7dd1250bd1147.pdf
    • https://static.usrfiles.com/ugd/4b7290_9c3b1f52d1514c629bb841ba401d51d4.pdf
    • https://static.usrfiles.com/ugd/3cb6cb_ec4dc201bd2b472a9de307b0702c7f24.pdf
    • https://static.usrfiles.com/ugd/d31907_9dc1f9e2ff3141a9bd751dd7330c1230.pdf
    • https://static.usrfiles.com/ugd/0cd019_89c76b67287a49b0b2bfd01bfa134b4b.pdf
    • https://static.usrfiles.com/ugd/c1c462_a0aff903c5dd4f8983b824b33af23f87.pdf
    • https://static.usrfiles.com/ugd/37321e_174955fbb3194c0eb7787b98791b165b.pdf
    • https://static.usrfiles.com/ugd/2ddd39_ca0270013cc84a06838e3c3cd0d1a54a.pdf
    • https://static.usrfiles.com/ugd/d3758e_b8f41e7b0fe5416db129b570448a7f85.pdf
    • https://static.usrfiles.com/ugd/9c0842_f86ff49be16c4c189644ca87fc586240.pdf
    • https://static.usrfiles.com/ugd/b8c837_deb879493aa64324a0062f7b02f87ef8.pdf
    • https://static.usrfiles.com/ugd/9421c8_db592959114d498aa574e8cf8bf60cb7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006599.bin
c83e0cc52563b08db3f4669931f781de32417c1f6e5a30055d03192b1f6a40be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5168 bytes
font_01_sfnt_off0000771d.bin
bc69698ec526befd31dcab6e5f01158bc5a0a2bd5d0f33add2f24eac5fdd5765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 10684 bytes
font_02_sfnt_off00009bac.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 4324 bytes

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