Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5898319c723e3b7…

MALICIOUS

PDF

49.7 KB Created: 2020-08-11 18:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b828c64e2f2f930c62cb8379088dc52f SHA-1: c8880ddf775151d2261a92de907e1e4ba104927b SHA-256: b5898319c723e3b77efd68ef182b94fa4ea6563e596b3c717061b9518a19517c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is part of a link farm, suggesting a phishing or malware distribution attempt. The document also contains a visual download button lure, reinforcing the deceptive nature of the content. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=edexcel+igcse+chemistry+textbook+answers+pdf In PDF document text
    • http://files.devinesolutionsiowa.com/uploads/1/3/2/6/132681690/3299649.pdfIn PDF document text
    • http://files.northeastinsulation.com/uploads/1/3/0/7/130776483/takolofi_waludamas_fufebinusune_liborexu.pdfIn PDF document text
    • http://files.lifebizsoulutions.ca/uploads/1/3/1/3/131384573/7695240.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/1/0434/6835/7796/files/fafijif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/66873985266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/tugupijujigemunirawib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/cohen_tannoudji_quantum_mechanics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/bijekagusam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/85980966047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/placa_ateromatosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8167/8494/files/15167946583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/96783129963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/82358018645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/solidworks_flow_simulation_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/62480757581.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_off00008182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 5992 bytes
SHA-256: 4d6e5d6478bcc9678121d43d1e8c7550543ab4693e0a516f595ec352be62dc83
font_01_sfnt_off000095d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 10492 bytes
SHA-256: f17cfa89839e36e27a19e28ebe1b9f00f53c5d1c5f2490d8599269ec24f90878

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