Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9855d39a28800c3…

MALICIOUS

PDF

32.0 KB Created: 2020-10-19 08:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb1b681e2d28f877e20f190a2ea6cd1 SHA-1: 3e2239775f455a39e6074a5574e2778f99005d4f SHA-256: f9855d39a28800c3055a96ac76080a23b4bd3aab9d123e7c8b78ceadf69e1429
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a search result for legal documents. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.cc/123?keyword=libros+de+derecho+laboral+ecuatoriano+pdf
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/4084745.pdf
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/8028059.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/wolag_jiditaxadugufoz_vipezosipuruz_wepejuxi.pdf
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/b89edc097.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f88626f68162.pdf
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f8b1eadbf359.pdf
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f8882ba22a16.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0e3e84a6-eac3-4306-a9c7-668e51112109/rowatajexo.pdf
    • https://uploads.strikinglycdn.com/files/ebca399f-a3a0-4440-9070-5b578b2a41b7/fowud.pdf
    • https://uploads.strikinglycdn.com/files/f709f361-7563-4b24-ab08-4a191cb30c9e/12383579031.pdf
    • https://cdn.shopify.com/s/files/1/0483/3669/9555/files/wulodasi.pdf
    • https://uploads.strikinglycdn.com/files/a95c6464-eb03-4f16-bfc3-ceebc69e15b7/gifejopavoxozuvolobaw.pdf
    • https://uploads.strikinglycdn.com/files/6851fa31-5ce9-481e-aa2e-f3c32784d9f4/xegepasikonajorakemimovi.pdf
    • https://uploads.strikinglycdn.com/files/356b4820-c8b6-491d-a266-170a2720c86a/gumosaxoxeromasazabawoj.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006797.bin
2b5cb0319aaeb57ba4fa555000dca135cffc6647cd475a68cfe03c98222fd270		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5324 bytes

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