Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b83cb05afcde398…

MALICIOUS

PDF

41.7 KB Created: 2020-11-03 05:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5e159fcbc62c0fd09d1f6e12f0d038aa SHA-1: e05b15c064ba31d0a2933386962b81338f03eb96 SHA-256: 6b83cb05afcde398cc93cbe017fb704f9fb6d0fd067926c6fa122879c4c1685a
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 farm and a critical redirector link to `https://ggtraff.ru/123?keyword=brother+sewing+machine+273c+free+manual`, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of numerous embedded URLs and the redirector link suggest the document is designed to lead the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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://ggtraff.ru/123?keyword=brother+sewing+machine+273c+free+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f89a3bc80b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f91cfc8a05b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f92714a063c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8be9c0c70d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454665/normal_5f9fd45f45e75.pdfIn PDF document text
    • https://mulelene.weebly.com/uploads/1/3/4/4/134440938/xajuguvosedulov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f99d0bd82844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f97e4ca8e9d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5f91b71f25530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455198/normal_5fa06ef82486d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f870fed17e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5fa01cce78e6c.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/9403703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5f8e8f4faa48d.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/wonoti/pitebukasuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5959/2349/files/text_to_speech_amazon_kindle_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/stars_manual_re3.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_off0000620c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620C 5812 bytes
SHA-256: 5da255b438dc360a06cbd7b72617698726962203022376432abb96d5b59eb79d
font_01_sfnt_off000075d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 10936 bytes
SHA-256: d41e75ae1b1b56d25ec127b82b8a9a05c993fdda097be55e1688eb145301d45b

Open this report in the interactive analyzer, or submit your own file for analysis.