Malicious PDF — malware analysis report

Static analysis result for SHA-256 128f9c59bb177438…

MALICIOUS

PDF

74.9 KB Created: 2020-10-25 10:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3d401d29cd96d485f8a3ec5fc22a5a1e SHA-1: ea2cf5e064996644f8930e0d4871518770fbc728 SHA-256: 128f9c59bb17743877bce0b37574fa0659d133bfcbedd48f15fdd9ae2eb1dff6
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 critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/123?keyword=theory+of+photography+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.link/123?keyword=theory+of+photography+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f937cd744e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f89fd8896e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f917e45d67e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f8ed720b83b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f9178d51a2a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f91c5acb31c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8746a851276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f9016d2a3fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5f943d13ef288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5f8de48e55b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f8a855e8ee01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5f8ab38f62e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f8cb1f737a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f88bb2c9763e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec02408d-1c5d-4e2a-b899-f7aacce99d34/25084202587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fa3a2b-ca28-4fe2-bcc1-3b7a9a6bd5fd/joseveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3357f47-8673-40a0-90cf-9d766c08a245/tufajarizukemexotawezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c58f597-fae2-47f7-a8ca-c5f8a6913255/jomekuwuwozolasulak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09cd924-806b-4eb4-a8f8-f800055c3da6/10139794945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ef9fdc-6ce6-45b4-8927-c3a112821160/bituloxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d347823-1dbe-411e-b190-181e1b50da5f/673889917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5597c7f9-6910-4e64-8e8d-cd84d9dbae92/jibuzidamipewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442a8f65-8f1f-4644-b9bf-c6e93df34567/supilifurodulirurusob.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD180 5144 bytes
SHA-256: 85d70f7e8fb9b79e6fe4874dc1d9ef912598bc384c2c8a82be903dbeae872fdb
font_01_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 7492 bytes
SHA-256: 6b119c40d70e6b7a8298feafb0bac73e188bd5f9c816c7fad837d163a7e7d6ee
font_02_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 11520 bytes
SHA-256: 11f1dcee4951efc241b70472b4dbf8f5d37b5543db2e39aec8e0240487ff11ad

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