Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc96d9d4a6c41fcb…

MALICIOUS

PDF

44.6 KB Created: 2020-10-28 09:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d6ecaff9be8239f5f613223f9d88e47d SHA-1: 433971147c2796cd64244f325a5366c7f951a929 SHA-256: fc96d9d4a6c41fcbeb30030c669c247f8f5dc58c7f96acf33a931658b9cd5bd1
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains an embedded link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL which likely serves as a lure to trick the user into clicking it. The embedded URL is the primary indicator of malicious intent, suggesting a phishing or redirection attempt.

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://gettraff.ru/strik?keyword=july+manufacturing+pmi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_5f936da727c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f98c2961d0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f89490fb2d13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5f970e87e8e65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_5f906eaae5a01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8d7d87a9f7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3941e6e4-c483-4d96-bdb0-017bc43516d1/nafonudokudud.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/6111246365.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/zidenozofibezofol.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/2398836614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff606228-c4da-4b2d-af5f-95de59393e99/jonufede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d739121d-f0d5-4038-8ee3-3ac50757df63/60785344104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097ce484-1d07-49f1-b78b-3edbbb1a4ef2/namadukabomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60a7fd7-ada3-484b-9641-3fe5f1032e3e/dupekare.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/67812985234.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/el_estudio_de_mercado.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 4904 bytes
SHA-256: e1247d35eff159eb7472413d86b53c00dccf7a626001c334e90a806fda9369be
font_01_sfnt_off00007529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 10116 bytes
SHA-256: a275ba50c02219342b29fddba94a963649cb2773a214d759c09f9bdde69d7cf1
font_02_sfnt_off0000977f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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