Malicious PDF — malware analysis report

Static analysis result for SHA-256 27156bab3c4247c2…

MALICIOUS

PDF

41.1 KB Created: 2020-09-15 22:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0372fd102e0fbcf11c492395adbf6eca SHA-1: 07697493aa77c62ca0d9fe7dac4e217cbdcd38a9 SHA-256: 27156bab3c4247c27a9ce7ce176bff29505966374664e9061fc656efda54c212
90 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a school supply list. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired. The embedded URL leads to a known malicious redirector, likely intended to deliver a secondary payload or phish the user.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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/pify?keyword=kate+sullivan+elementary+school+supply+list
    • http://gitasa.caitlincannonphotography.com/uploads/1/3/1/8/131856435/67c60e.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/58141504808.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/http_cabal-_luminous._com_s.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/lugokovabubilipiwitisa.pdf
    • https://static.usrfiles.com/ugd/3f0e57_817f31fb9d6c4f85adeed3277c32734c.pdf
    • https://static.usrfiles.com/ugd/d5d855_c34530a7a802402e8d69a10ea9d68445.pdf
    • https://static.usrfiles.com/ugd/8a419d_6bcb9b2012754f518657640214bf1204.pdf
    • https://static.usrfiles.com/ugd/72b0e7_92529b833f7946ff8753dc50d6e10664.pdf
    • https://static.usrfiles.com/ugd/7a359d_105b266a645b466280c5742aaae92041.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_off000054b6.bin
0828a9c3271c3e8f0c12db0413b575b25e88e891c2204534c2e5cfadac1962b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B6 5184 bytes
font_01_sfnt_off00006638.bin
07155cef68656f90f1ab88c0ec32bc676c9f5fa8085e5588a75907c794f8123d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 10436 bytes
font_02_sfnt_off000089f8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F8 4324 bytes

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