Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82e4e0fbcae1858…

MALICIOUS

PDF

56.0 KB Created: 2020-10-28 15:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 80ecce8038a5bd2f87261c73b3784e36 SHA-1: d812d5fcc6a585f83422dda2d9811ce450d4f1ec SHA-256: e82e4e0fbcae18587f50974b2ab20ea9e8082bca5963beaadda3e487e7e3bef4
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?keyword=tier+1+interventions+behavior In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f92f7379a7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f93ee68d01a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_5f973f13c2b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f93e86c1399a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425784/normal_5f979c93d0eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8e17f4cae25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f945905481d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02a54c5-9811-4bb2-9c12-88fbdf0d0f90/jipijinurobetatadifekati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e22b70-a18d-45e8-a530-924b0096625e/koxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe7c659-ebf8-47cd-87a8-096a92209c29/58339305860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c439c7ab-9d3a-40e9-9bd2-30a0c67c7fc7/28155244505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68072b19-e9a1-425c-a3d2-115ec353af50/janelatasesuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33e099f-8fc3-42a7-9522-7b49bd1b32d0/fufuxudarulekemarakobino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97154ea6-f3b0-4717-b474-b018b000b291/bumegorinixuriwifagukef.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/37309013108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177e2cfc-1096-447d-ba4f-c919c2b7c126/becoming_a_prayer_warrior_by_elizabeth_alves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d68217-648e-4b12-9dbc-70be06bee679/99808730832.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/libegusufagaguvazowasa.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/radish_and_turnip_salad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26dc5504-2216-4cbe-9045-29c801e65781/pdf_download_for_windows_8.1.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/cambridge_additional_mathematics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/38723954149.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000ae9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAE9B 21144 bytes
SHA-256: 00b01f9f0a037125043e2c8f1888fe22f0616072a555360c44798f92ec2d5a7d
font_00_sfnt_off00007782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 4940 bytes
SHA-256: 460fc63d8eb3767a70120518a8d45ce61567143bee6b13d3b3f67f8ab2f12000
font_01_sfnt_off0000884f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884F 11180 bytes
SHA-256: 05ded69f5996732555517e628c3a2090e28a11e025f4b5445410aa6d16abdc7b

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