Malicious PDF — malware analysis report

Static analysis result for SHA-256 181d612d63cc8477…

MALICIOUS

PDF

76.7 KB Created: 2020-08-15 20:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78837bf9b39c8c0b1240964e0f846666 SHA-1: 9b5a27654f0ae00a02627d69d27ae7669b40e3a7 SHA-256: 181d612d63cc84774d5af2cd3d46166c042ca0626ecbf9170608ea27f25a288f
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body and embedded links point towards a lure for users to download a PDF, which then redirects to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/wb?keyword=rig%20veda%20explanation%20pdf In PDF document text
    • http://tirerib.fordjudoclub.org/uploads/1/3/2/8/132815196/497375.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/1/0433/0687/7080/files/tebagomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/funny_ssid_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/xuguxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/politique_dfinition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/36625027083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/jakeenan_gant_scouting_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/vusanepagukofixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/glass_curtain_wall_section_detail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/phase_angle_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/additives_in_concrete.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 5072 bytes
SHA-256: 182a0532516cb35f35785235db012aff1bb6b00f0ae6370f466f0dbba8e1658e
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 14472 bytes
SHA-256: 81a9d5c28ee7b09e938b73af239e80582ec7282fe72d031aa397087c6402ad9c
font_02_sfnt_off000110fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 16224 bytes
SHA-256: b2420688700ae8092c1c17765f76d7be945926092e36c06f35a393ba2fc63381

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