Malicious PDF — malware analysis report

Static analysis result for SHA-256 700b5ebac1d7dd85…

MALICIOUS

PDF

43.6 KB Created: 2020-10-29 03:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b917cdcda2d6db5ac202b06f72cbf435 SHA-1: 6d64e6f34976b5ed8bae981a023c99a5661dbd65 SHA-256: 700b5ebac1d7dd859ce7a4cfdb38287d662ed1b99674fa78291f29a03d281c12
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised within content that appears to be educational material. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious link indicates an attempt to redirect the user to a harmful site, likely for further exploitation or phishing.

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=properties+of+definite+integrals+ncert In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_5f9a05c41b7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8bafe3b1c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f98c92732583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f88d4e037932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_5f997e28e407d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f97689335fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f931d9102fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5f9597931ec86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f8b95e35780e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/rawusekosivo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/isometric_and_orthographic_views.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4922c4bc-68fa-4084-8417-20c749998a25/lenibilojit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef84f054-8008-45ba-ae2c-1206edc8b85b/bufirexumodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702e5643-52a1-45cf-b540-cdc313a8e5cc/pro_tools_10_ilok_crack_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bcdbb1-b5a6-4b83-a5b2-00ea9d1f65ba/45267135484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37b8108-a823-46be-a4ac-99e8705f41af/widav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decbe105-64ed-4881-9f47-67e66b43ab16/figurative_language_definitions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41273271-732e-412d-a2fd-a23567fc1c57/resanizebif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da27a306-52ae-4699-a31c-117819716fdc/lokijexogaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a46eee5-1d98-4ae3-8bcd-91909dd9a803/tudibametowik.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/77041542671.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/45599056545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cc0e8d-d08e-4732-84de-6f8674909b4c/ginidatosolifubemapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5553e8-0e40-43a6-b19a-2f8dadb68842/14766491209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697916db-87e9-4195-8f29-c9df15d5b91f/5878700445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9f44b0-0972-4ed9-87a4-79ebbfbcb471/exercice_corrig_augmentation_de_capital.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 5324 bytes
SHA-256: ebc93df450e61ff993d9bb49648bc9af9c4ae035a31efcb1c94d6f61b48e6483
font_01_sfnt_off000079dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79DC 11520 bytes
SHA-256: 28e672138fcf26048568ff38a550667144ad213a767c0499b18520cc8489949b

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