Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee535a237aad824…

MALICIOUS

PDF

46.7 KB Created: 2020-10-27 12:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1a21cf7ade2abf513a25c675911f0fc4 SHA-1: 1ebddada3fa8a62032f973c5baab4df54cdc57ca SHA-256: cee535a237aad82425bdf7493ee01c5c96acb39862f3fb1aaf87d88b0015a21a
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service identified as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to drive traffic to malicious sites.

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.cc/123?keyword=d%2526d+guild+master+guide+to+ravnica+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8b2cc29cac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f97d399c6bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f876699c9f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f95aec1c190f.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/boxatemet.pdfIn PDF document text
    • https://wonenizawelob.weebly.com/uploads/1/3/4/3/134315845/lunaxuza_xigelavul.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/3837160.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/1/0481/0683/2024/files/bard_spell_list_pathfinder_kingmaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc3ee78-7501-4a40-a9be-51e2ff65971d/how_do_you_say_werewolf_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8c90f7-4ad1-47d0-b10d-8eb4fee7f38f/63962766511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e6eb1f-b6ef-4aab-9689-d6b43e669356/37090341996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889202de-b4a3-4944-8957-07d15563c083/medidas_antropometricas_del_recien_nacido.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/criticism_of_structural_functionalism.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/wexofokotilaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec24ad37-9374-458d-8a5b-a49e71c0ce72/kajikowavoduvojuzadoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf46439e-754a-48a5-b40d-1c1733a889df/pefemivikotifobaxuwepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae16bf4-2607-43e9-a969-bc74d05714eb/xonaliwajejoripune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc90a9de-0893-48c8-bfcc-ba75b91b22f2/92164876100.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_off00007bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 4156 bytes
SHA-256: 491d847b6606b2aeef656f0a947dbdea29e01eb243e8a29fdb65c017b6eb5ea4
font_01_sfnt_off000089ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EF 10540 bytes
SHA-256: e61ff296a83ce2dd6cd2287012be915a05cf6d6d0cf67625aea5c17d2cd3a39f

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