Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3b5a21b2fb5a58…

MALICIOUS

PDF

49.2 KB Created: 2020-10-04 18:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 0957511582a3050d32a5a495b08e2d07 SHA-1: 154517ea6df347dc2f0edf87a7300df479d313b1 SHA-256: 4e3b5a21b2fb5a5882a945d276388735692f2e7dee856fb74baf8b5143353113
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/strik?keyword=isim+fiil+konu+anlat%25C4%25B1m%25C4%25B1+pdf In PDF document text
    • https://site-1039833.mozfiles.com/files/1039833/77575245800.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/pekufe.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/suxow.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/1/0497/5067/1514/files/megabox_apk_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3872/3226/files/laser_guide_rod_92fs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/gabibasezewag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6534/4935/files/84809750581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/bilutozetibafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da52969a-2416-4906-962a-721940bf44cb/labovozajos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3db37d-98d5-44d3-8332-5e6a1273ccb1/65138842569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387f4b53-6430-4354-a78e-5a79f3ca07f6/dosimafelugaxufokibuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4203/2794/files/majexopilidetog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2333/5063/files/another_word_for_accomplish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9703/4393/files/ibm_uk_personal_pension_plan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 5124 bytes
SHA-256: bb4c0fa22de0b0ed777648e21a1d2c03c3caa1dfb11154e5efa053cffe56da69
font_01_sfnt_off000080cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CB 2636 bytes
SHA-256: b085c7a46ecbcc0f97c58edc46d319df5b4649a6f65f83437094fe96557903c0
font_02_sfnt_off00008b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B83 14400 bytes
SHA-256: f95084dca16c4bdd17e5eeece11a9e677304895aff7c4e2de95aef5b198b5849

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