Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8ae782e06aa3ae…

MALICIOUS

PDF

63.1 KB Created: 2020-07-31 01:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d5ce6d7a1884f4b09d12681b95cba66 SHA-1: 819c24623683ecb3548219bbfb961da64073216a SHA-256: 5c8ae782e06aa3aef71c1cb339260e2fbd9911fd19b4f4e973ca576349accbbb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector and link farm, designed to lead users to external sites. Specifically, it uses a link farm strategy with 24 PDF links, many pointing to SEO-optimized redirectors like 'ttraff.cc'. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL used in the lure.

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=behavior+management+strategies+for+parents+pdf In PDF document text
    • http://files.lyrikalstorm.org/uploads/1/3/0/9/130969681/5102676.pdfIn PDF document text
    • http://files.sojournersoap.com/uploads/1/3/1/8/131871569/mitog.pdfIn PDF document text
    • http://files.owl-valley.co.uk/uploads/1/3/1/3/131380899/wifidojasulofamamis.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/1/0433/4085/7494/files/kidumifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/sufazukerunog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/87803729637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/juvijonanitabizuwolev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/vezevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2046/5829/files/benelino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0652/4583/files/jazezosukezinodimilibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/74023015931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/zoluxuwirigaruninurulelu.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_off0000b1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D4 5320 bytes
SHA-256: 7a4136caa2ee50754f2ce05a95754e0f25bda868054b854b5b97de38e9c2717c
font_01_sfnt_off0000c3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CA 13872 bytes
SHA-256: 9f0dade9e3c06bd46bfc58166bd0fa22599a92abf0ed9f92f0a4dd2a8ad817b6

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