Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b978584ea59f46c…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 15:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6918e9819c32cbdb81d5306ab0f48bbc SHA-1: efbf40cd57a8a989ea76b5c523200cfbcb8e1cc3 SHA-256: 4b978584ea59f46c7c1809a5a228612b97199da698c18c4302ea16578dc4b32b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Trotec job control manual' and the malicious URL, suggesting a lure. The heuristic firings indicate the PDF is designed as a redirector and a link farm, likely to obscure the ultimate malicious destination. No scripts were extracted from this sample.

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://ttraff.ru/wb?keyword=trotec%20job%20control%20manual In PDF document text
    • http://poxok.devolinadventures.com/uploads/1/3/0/8/130874038/vobov.pdfIn PDF document text
    • http://zituzu.singwithbscs.org.uk/uploads/1/3/1/4/131453301/zibifimevisutugakir.pdfIn PDF document text
    • http://files.flyrgfa.com/uploads/1/3/1/3/131381428/248d5aef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2131/9837/files/30323529048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/gutowir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/university_of_texas_austin_campus_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/migration_certificate_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/bowinugem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/botatisobiwoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/british_gas_smart_meter_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/98140726773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/59647823326.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 4764 bytes
SHA-256: da17fea0b6cdc7298de022901139d7a7dbc892f951c4bb89df16d0ef1a459a68
font_01_sfnt_off000073b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B9 13624 bytes
SHA-256: 2a9c04ef752a8f1410eeafa93691030a05d02e0610da03938ffc07419533bdb6
font_02_sfnt_off00009ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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