Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dd8c3db2308c11…

MALICIOUS

PDF

47.4 KB Created: 2020-11-04 06:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d97d3e7d03ba2f94237c472a0b9c2393 SHA-1: e05cd2cd34e64b59e647027f4102644d3f1ed037 SHA-256: f0dd8c3db2308c11ea6991ba46f018d09edeae1aec346b0afd9e5c5fd07ca44d
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 link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'prodigy school game for kids to play' which aligns with the malicious redirector's keyword. The PDF also hosts a large number of external links, indicating a link farm, which is a common tactic for SEO poisoning and driving traffic to malicious sites. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or scam attempt.

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=prodigy+school+game+for+kids+to+play In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5f938707e25e2.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/5091743.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://s3.amazonaws.com/wonoti/64847509249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a316d9-7760-4e73-9756-ce70a034e637/honda_xr80r_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/56636301615.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/6703332521.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/85896328143.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/image_citation_mla.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/rupujorowesivanedofagud.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/lakurolenej.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/80208169230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8f0a5b-6b1a-420f-92e3-1de122d64526/bubaxexubevemenateka.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/34150595033.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/viwewi.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_off00006d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 5420 bytes
SHA-256: b92f261092951f1f355f547ddf19a0284953fdc5404ab693078fad250b900cc0
font_01_sfnt_off00007fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBF 10188 bytes
SHA-256: 8c2b86f0f4ff9c9bc2b11cb6dd1495cfced2d7f5d63349bf23b214e96af07b03
font_02_sfnt_off0000a297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA297 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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