Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b425bfc1cabc781…

MALICIOUS

PDF

45.4 KB Created: 2020-08-23 07:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df8b8ca96a6f5a9dc39518e284f96725 SHA-1: 394523eb050ebb183a213f5615c5a064c7289e45 SHA-256: 6b425bfc1cabc781f72e158ee8bfaa95f45a6e5c5b33f3b0a3c052d8863afd41
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or to download further payloads.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.ru/pify?keyword=ps3+emulator++for+android+nougat In PDF document text
    • http://files.ismaakarate.co.uk/uploads/1/3/0/7/130740175/ronupaf.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/1/0431/2052/5476/files/xorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/pikuwugupaguviveketerub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/17417831479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/aadhar_card_update_mobile_number_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/fifazofebegosafef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/beruwef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/chain_rule_differentiation_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1344/4508/files/camelia_jordana_moi_c_est.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/63633864095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/puvilejiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/arbitration_act_1996_bare_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4406/0839/files/flow_cytometry_principles_and_clinical_applications_in_hematology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/36588475872.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7350 5392 bytes
SHA-256: f330dfa1c69eba8ce8a571ed2bf34379b4b13ffcd43a5e183a1b601826445ac8
font_01_sfnt_off0000858d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858D 10360 bytes
SHA-256: 72f4e9bde323fad2763a3a27c52914adfe85d8e811441e3a389be27372d2b1a4

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