Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8e6e93a629adf3…

MALICIOUS

PDF

71.4 KB Created: 2020-11-02 08:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb3c42858f6da398e1e254d84ebf215f SHA-1: c0cae188f089d18b9dfc92545b20d82f8451a041 SHA-256: 2c8e6e93a629adf396b2a52e95ed0973500472f6163d5de76b9015b196e8ee76
154 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 linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.link'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct the user to a malicious site. The presence of numerous external PDF links further supports a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=catcher+in+the+rye+what+time+period In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5f91a1b748e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f9351a9d4bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f9a1f8dcde96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_5f9f9209951e5.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/ganubifirigevi/28832361875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c97f8b3-88ff-4056-a6d6-81fc2f8cccb1/5318891480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0793478b-6c21-43ec-8271-3941a845ecf6/nulikovinokufevapewonasos.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/calendario_oficial_sep_2019_a_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613e46f7-b616-4d1f-b239-dcb591e253b4/76157298513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4864/8354/files/world_wars_game_hacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a753eb5-0e65-460d-95fc-fc64b2687180/17126870422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8b19d6-785d-40b2-8a0f-664072bf9d97/mafetikopixan.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_off0000d8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FA 5204 bytes
SHA-256: 55c8042fa4d23e4a1e40233044435fd3c66252485c93b5eb337414b172c3ba9b
font_01_sfnt_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 11200 bytes
SHA-256: 4504e2d175f3d5b2dd31e6e5c2ae05748e88b5a2aad3935e1fe4e1937d966f89

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