Malicious PDF — malware analysis report

Static analysis result for SHA-256 8183cebe0d8994be…

MALICIOUS

PDF

44.5 KB Created: 2020-08-07 20:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce9bc571c6612de98b03eeb4e7cc4441 SHA-1: 548824b3c6aacf77966dfa15c372923a849833f0 SHA-256: 8183cebe0d8994be98aa4e8f79ac4eb6b09171790b774ec7d13cc892be347b16
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though partially corrupted, suggests a lure for 'abstract reasoning questions with answers pdf', which is a common tactic for phishing or malware distribution. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious payload or phishing page.

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.cc/pify?keyword=abstract+reasoning+questions+with+answers+pdf In PDF document text
    • http://files.leehanson.net/uploads/1/3/1/4/131483138/326f6162a2875c.pdfIn PDF document text
    • http://files.daimonproject.com/uploads/1/3/0/8/130814475/7883973.pdfIn PDF document text
    • http://files.barredwoodsmaple.com/uploads/1/3/1/8/131872238/guberolu-bamokugurij.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/1/0433/9823/4270/files/92879678205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/77424910764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/6819262106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/34232313680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/sentry_safe_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/fekovazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/irc_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/75285527109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/xamujabupijup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/koxubexivetijuwis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/skyrim_risk_rules.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 5

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_off00006eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 5732 bytes
SHA-256: c73d99e58603ef468cabfc2b3bb82f27252de5682928fd9619fd9d39c6a0391e
font_01_sfnt_off00008237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 10204 bytes
SHA-256: 5042845e274066d6aff7c987f8c0347c20c0534db39ef577682ca2401147c3df

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