Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a39ba39a9eb0de0…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 17:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 619cb4ce3513a1af0c0e8393976cccd8 SHA-1: b8015134aa303af8d4b3f0765e6dbc0c29c30f81 SHA-256: 0a39ba39a9eb0de08aec26ef3f4ddd817fff77d7a944ff80c9debf43bad1417a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to SEO redirectors designed to phish for user engagement. The primary redirector URL, 'https://ttraff.ru/wb?keyword=robotica%20industrial%20pdf%20livro', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a lure for users seeking specific documents. No scripts were extracted, but the presence of malicious redirectors and the ML classifier's high confidence indicate a malicious intent to drive traffic to harmful 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.ru/wb?keyword=robotica%20industrial%20pdf%20livro In PDF document text
    • http://files.mrsdavisswghs.com/uploads/1/3/1/4/131406441/b5167d1b21061a.pdfIn PDF document text
    • http://files.hockeyparentcoachdevelopment.com/uploads/1/3/0/9/130969801/ba509ec2.pdfIn PDF document text
    • http://files.speakingyourbest.com/uploads/1/3/1/4/131453284/gawekuj.pdfIn PDF document text
    • http://files.neonopen.org/uploads/1/3/0/7/130776745/7c31006ef4548c8.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/1/0430/0252/7895/files/wawovuriv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/estrategia_comercial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/37074213909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/87685281357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6473/7438/files/basic_econometrics_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/misumuzipetegaxapazipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/91474109660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/65783303924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/fejogorifikabaziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/psychology_vocabulary_in_use_chomikuj.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_off000058ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 5356 bytes
SHA-256: ccecf5c433be7a1e95113278fefcf65349834db05c71365a9926d6db33ccb701
font_01_sfnt_off00006b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 12196 bytes
SHA-256: 1bb6f8b2ec58f76a323fb2f4e0b0e99109151c06dcfe1cd5c014f2411b848621

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