Malicious PDF — malware analysis report

Static analysis result for SHA-256 1831e2003e08b9eb…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 07:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be87792d62986820dfa4bac86c332b4e SHA-1: c519f6012fc1246fa845321bccaa0afd69dd6e23 SHA-256: 1831e2003e08b9eb59e7c95a7866e17d8077ee35d7628d0e270f5b723eda8fba
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially corrupted, contains text suggesting a lure related to 'agreement on safeguards pdf' and includes the malicious redirector URL. This pattern is consistent with phishing or scam attempts designed to lead users to malicious sites.

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/pify?keyword=agreement+on+safeguards+pdf In PDF document text
    • http://files.universalhighways.com/uploads/1/3/1/1/131163859/wisebiguki_jebojure.pdfIn PDF document text
    • http://xomugos.rachelbrodie.net/uploads/1/3/0/7/130776603/bujir_nabefiluka_dadugamubeduji.pdfIn PDF document text
    • http://files.kathybertone.com/uploads/1/3/1/4/131438541/dujasirowo-roxovafukop-kilamuxenukoloj-zofikaxe.pdfIn PDF document text
    • http://files.kellergirlsbasketball.com/uploads/1/3/0/8/130814652/8745586.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/1/0433/4062/8120/files/mhw_warped_feystone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/xukuwokavewixobejorazomeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/73321111706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/sugasorapuvasaluwigiluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/sun_beam_grill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/kalesawivofenejakujezob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/68367208123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3507/8306/files/26135020754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/fugudizomog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/vutuwaguzirinorivi.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 7

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_off00005ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF8 5320 bytes
SHA-256: fd6fd402b0522d7791486b5ea1446ff728c77c62752f6221b17775981768d796
font_01_sfnt_off000070fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 10084 bytes
SHA-256: 687a4b1da384a96c0a78e5d1094524646a6528081abf3d4469fa70926936ed70

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