Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfd2022bf991b4d…

MALICIOUS

PDF

42.0 KB Created: 2020-10-27 14:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 00aca71fc1ca8522c51e7a62e60e5bbb SHA-1: 2b8a1d2f331ee1245f8a18b8d76b2bcf36706c93 SHA-256: 6cfd2022bf991b4d0131dc1e05319e99cf13bfa3bcdde1bdbbc9b25ae69e7c11
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 URL pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the file is designed to redirect users to a harmful site, likely for phishing or malware distribution.

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.club/123?keyword=ice+hockey+songs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5f903b7d7a8c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f8f389fc14c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f8b91b97a4e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6677/7500/files/4562704329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4650/0030/files/soweme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/free_handwriting_worksheets_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3038/7605/files/60377125563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/80615951702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31126f7d-93dc-4cf4-9ba9-9aaaa4d8e140/mutant_chronicles_rpg_3rd_edition_pd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410a5ee1-f3e5-4ab3-a939-0a735f6f6e96/14723041313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676ab74b-4286-47c8-a97e-219633183749/43631957840.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/winter_air_conditioning_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/kuladi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9051/9221/files/xibugedanoxavakowixuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6988/5601/files/85088569072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2438d371-c13b-4177-a2f8-c7bf4b8d9395/dedepezefinikuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363c4a2f-f208-491b-bcdd-68fb78db9a22/65353724833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b498e5b4-b1ac-4b16-9333-92250d6212a1/22061078857.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_off000065d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D9 4828 bytes
SHA-256: 04e8ac7e329fd475f20d20217dfe55eeeb44606f781add3c690bb6c8903c2f78
font_01_sfnt_off00007647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 10832 bytes
SHA-256: f45c89a8657315abdecbf11b48f28a390f2edea492991ec37f17abe29f244c5b

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