Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdade3f42c04a8b0…

MALICIOUS

PDF

42.0 KB Created: 2020-10-26 02:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: da0568984cc1b0b1c08223b5a6f49c66 SHA-1: 19f214a205a067a317b05a764a4e011c90c2ed02 SHA-256: cdade3f42c04a8b02a92ff7886b2741cd61c3fca77614c2da246bebcc4d39ffd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to card game instructions, but its primary function is to host a large number of external links, many of which point to a link farm. One of the embedded links, https://ttraff.com/123?keyword=evolved+harvest+7+card+stud+planting+instructions, is identified as a known malicious redirector. The document's structure and the presence of numerous PDF links suggest a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.com/123?keyword=evolved+harvest+7+card+stud+planting+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f87380a4f99a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_5f91d1d6b3d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f8c3c5b822d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f93ed6ba4669.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/defa265a-f16c-4575-af11-0ec09091ca9b/52777275665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8998f1-3e1b-431d-8f47-dc3a149970e3/gorudijomolagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0042/9206/files/81954951439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/60399304287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5598/5814/files/amliorer_sa_confiance_en_soi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13aa06a-ac12-4263-92bb-090393efdc98/nemoforizazizemijedofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1d1846-1b48-4d78-8c8d-74a49ca642b5/8521597796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8d8a29-160d-431c-a8c1-1be1af54aacf/mekegikiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52538a5d-e563-4c0e-8fc2-de418d47526e/paxegapelewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deaf625e-3e07-452c-94a4-707e1bbf702c/28468753469.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/logiciel_pour_assembler_plusieurs.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/19207978029.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_off00005550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5550 5316 bytes
SHA-256: 4214f2fde79d9d5a0d2e253964f69860337f794827fe95a4d4a70e1b26607c86
font_01_sfnt_off00006769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6769 10348 bytes
SHA-256: 192a0821d05e85b52c1e4d8be688d23101d02049f184edc077c06f800baa397e
font_02_sfnt_off00008a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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