Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25762588dd6dd1b…

MALICIOUS

PDF

47.1 KB Created: 2020-10-30 03:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f160c4ab625beea29a0991ed965e400f SHA-1: 3284de14cc276b04878838579f20fc8a8f93a53c SHA-256: b25762588dd6dd1b0318c3dda4b319c3eb0ce57de83dae631e7ad87b14f53f0b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous links, many of which point to a link farm designed to manipulate search engine results. One prominent link, 'https://ttraff.club/123?keyword=best+hcg+drops+gnc', is identified as a malicious redirector. The document's structure and embedded links strongly suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=best+hcg+drops+gnc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8924536ee47.pdfIn PDF document text
    • https://degepuwenezeg.weebly.com/uploads/1/3/1/6/131607310/adf993.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/20f8c96ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f874b9f4df7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f9672dd8a404.pdfIn PDF document text
    • https://fozijiruzixusap.weebly.com/uploads/1/3/4/3/134317533/1282543a44b32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/chuyen_tieu_lam_man.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1171/9335/files/wosimukuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c5ae9f-4459-4a14-8dc5-32f5ac2acb1a/Bluttest_fr_Zink.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/66753021437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b40a55-c76e-4f35-91df-9bdf336e4063/44239395463.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_off00007a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A71 5140 bytes
SHA-256: aec363380a9d93d4117370f2e2d8bb08e9026e008980cebd38fcdc6e37e5efc5
font_01_sfnt_off00008bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEF 10528 bytes
SHA-256: 947cfc9253ac45d8aab0485bce88525843ad6a08f1b9e7af174bfa335b94a4e5

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