Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb96c73eb391126a…

MALICIOUS

PDF

42.9 KB Created: 2020-11-03 10:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0e8614f9fbfef06f11dbd39f9848c02a SHA-1: 7711ebf22ab60ebba766a6eef4cbd7d8c1776952 SHA-256: cb96c73eb391126a8a188de221c7627e04e40112e863a3f04b55cc2e8b361841
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a search result for orthopedic services. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/strik?keyword=orthopedic+for+knee+near+me In PDF document text
    • https://bixanizutojez.weebly.com/uploads/1/3/4/4/134490846/8269973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f9415f4ba9ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8fde0a828a7.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/rojizisepenejaradu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f9b1de8c5139.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/xotabulesajo_mulojukiduligo.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/1/0506/9235/8325/files/51799238279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7805/0474/files/neon_genesis_evangelion_zeruel.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/66751062662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1882/9991/files/25017652830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8600/2359/files/34472485206.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/sofopobosomixedamagipeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3337/0007/files/dobby_hat_knitting_pattern.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_off0000691d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691D 5276 bytes
SHA-256: 4a3b614a1f86f41d14c70462ec90994c91823dd6a8fce9728afc710988c6dbb6
font_01_sfnt_off00007ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 10600 bytes
SHA-256: d1fc7165ef123fd675a7b1c969f9d4453e9a52626c54224e259bac748fb21fdf

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