Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d546b0d13198e03…

MALICIOUS

PDF

42.3 KB Created: 2020-11-07 02:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: eb24ab558ad3c4c644e3fedb3bda0960 SHA-1: 733c0ab963ee4c0d55600bf9fcca241571926dcc SHA-256: 0d546b0d13198e035f3c85d4456033575039e193317e4e79858662b81ded177a
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. One of the embedded URLs, https://trafffi.ru/aws?keyword=warrants+roanoke+va, is flagged as unknown reputation, suggesting a potential malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=warrants+roanoke+va PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5f97803fc90ba.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/6a088cca-42f8-48a1-b2bf-6769c1906d0c/nuforamevinikonupuvumoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334cf1d2-d6c7-402e-bd23-599c9af5902d/71688519914.pdfIn PDF document text
    • https://wusobosujiru.files.wordpress.com/2020/11/43267801177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb41c25-1608-47cb-87ab-daa00243f842/78747837599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d214d26-4706-4fc4-920e-3b5365f2e2a4/chinese_scooter_repair_manual.pdfIn PDF document text
    • https://lamokiwinube.files.wordpress.com/2020/11/fixavumuno.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cbb709-2238-4d07-98dc-43a0335059ca/buddy_holly_true_love_waits.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/fadazus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19591713-3091-4d2e-a180-0a0179087291/57237899332.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_off00006699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 4784 bytes
SHA-256: ca49143b82d98a21b0fd448eaf00ad14aa712238f6be6ce53e3c4ffa78dd7c0f
font_01_sfnt_off000076ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FF 10864 bytes
SHA-256: b5b4d2fd64846a548d8f29deb783898fe9e738450a8d009be05f77ee47aee9fe