Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c92aba5049df642…

MALICIOUS

PDF

52.6 KB Created: 2020-10-28 20:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 25d3be835c03d42ac2d5ce6e5bad13f8 SHA-1: 5dcb78eca4badb1fc0c14c388ebfa8e6534aa22a SHA-256: 1c92aba5049df642e9228aa47a994698734471cb6f7f72f5b6b62e75084a04d0
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are part of a link farm designed to improve search engine rankings. One prominent URL, 'https://ttraff.club/123?keyword=dbz+team+training+cheats', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly indicates maliciousness, supporting the attack pattern of using a deceptive document to redirect users to malicious infrastructure.

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.club/123?keyword=dbz+team+training+cheats In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/3ace25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8fa3240259f.pdfIn PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/80fcb26db2b0f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f8f37155d772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f8ab15b5c9f9.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/14024d15d76967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f86f9b693b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5f90dc3e2d703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f93fe958764c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_5f9496824398a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f877303462f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f8edce9b71a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8728b7a8b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5f98901670562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f892bcce91a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f890ecf1e5a4.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/vaxebisapesi/bozoxoduvebawevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8498/1436/files/calculus_2_cheat_sheet_series.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/canon_200d_specifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/zofapeberejirexawur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4494/5051/files/advanced_manufacturing_systems_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/35525872495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7320/4124/files/79462959381.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A0 5368 bytes
SHA-256: d74fb9add49feec594aee0d9f16265a398f515fbc467573773b5dff8bf1e3cc5
font_01_sfnt_off000086ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CA 10024 bytes
SHA-256: 6348c0a86868e8c34dd2f7aa05994f6f825645ec02043390082b3a765fa3fc29
font_02_sfnt_off0000a95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95C 18620 bytes
SHA-256: be38aad5a028696aad60438ea35332dcf292720688074b586b82d378d1a0db3f

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