Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3afb2163702c474…

MALICIOUS

PDF

37.1 KB Created: 2020-08-09 05:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4873c649aa7ee9daf5bb3e30a4b17eae SHA-1: fae34339640ef1808d7e0a57bb6f2cebcef6b329 SHA-256: a3afb2163702c474606f90575f26bdd4db94cb43102d8c5289a2149bf1557775
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass of external links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=energy+audit+lecture+notes+pdf', is designed to lure users into clicking it by masquerading as a document related to energy audits. This suggests a phishing or social engineering attack aimed at redirecting users to potentially harmful content. No scripts were extracted from this sample.

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/pify?keyword=energy+audit+lecture+notes+pdf In PDF document text
    • http://files.wichcream.com/uploads/1/3/0/7/130775997/gijuvanometapawona.pdfIn PDF document text
    • http://gikuzatup.detroitchamberorchestra.org/uploads/1/3/0/9/130969742/8435530.pdfIn PDF document text
    • http://files.discover-slovakia.eu/uploads/1/3/0/7/130775145/74f6f54ae1b6b4.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/1/0433/6045/2760/files/86840530089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8472/6943/files/sorujuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/dawopesifebunojuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/calorimetry_pogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/softpedia_internet_browsers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/wajasano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/sowok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5189/0341/files/fijaraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/mawarev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/medicina_tradicional_ventajas_y_desventajas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/munevufetinejutegajajil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8520/8483/files/javascript_sort_object_by_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/78882840135.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 4

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_off00005319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5319 5384 bytes
SHA-256: 2f53c8fe221a6c6836f6872e852b5034189fed7a42763eb68376eb97db9498fa
font_01_sfnt_off00006586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6586 9864 bytes
SHA-256: fb40da3ec551fada9be50181c173b68d59eb9eac6d23d6992a1904e389026eef

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