Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d74fced911e3d2…

MALICIOUS

PDF

42.3 KB Created: 2020-11-09 13:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6c96ccdfa523054ef667b6d78b9dd603 SHA-1: b97b3706562021030cf698a4ee34b17ca7838c6b SHA-256: 74d74fced911e3d28b93a75ab72e35a72230b42439be38c7dd1374fe3a5cd277
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 large number of embedded links, many of which point to a redirector infrastructure identified as malicious. The document body and embedded links suggest a tactic of creating a link farm, potentially for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent.

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://gettraff.ru/123?keyword=having+your+say+book+pdf In PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/kujorototojomesev.pdfIn PDF document text
    • https://tovepeluzon.weebly.com/uploads/1/3/4/3/134385389/41f2e625b54016.pdfIn PDF document text
    • https://gejekawuxo.weebly.com/uploads/1/3/4/4/134497426/vuwijokezazavapegi.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/d712d4d.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/4463143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d94169-82d7-463a-81af-f2bc46ea7582/pabemulenuvuwixusisifu.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/53536381989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f24690-3dc1-4cab-b7e2-8bf47d6fe4c2/rufisadilokesopowexewowex.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/55810633601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06a9c4a-bd75-458f-9318-46f9d64140be/49687960063.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/asian_material_for_kimono.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/little_millie_metric_worksheet_answers.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_off0000673f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 5504 bytes
SHA-256: 96a650477df266564db22596ebf3ddff6c14393e2a1afd5eb8206592fde1ed6b
font_01_sfnt_off00007a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 10260 bytes
SHA-256: 6d59d5a4c25a8aeb6878e3dde741ef05de359e0993105be993934cf3e59d59c5

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