Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ac53f109cb094c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 01:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a38d987f27e8b478a7924656d1ee1656 SHA-1: ec258d863fea8e99ff750d167cd63b62512cbc73 SHA-256: 33ac53f109cb094c2d74bb9dd75fb7400f9fbeb58800fe9937f796c84547acda
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL that triggered the malicious redirector heuristic. This suggests the primary intent is to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, and the PDF structure itself does not indicate specific exploitation techniques beyond redirection.

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=green%20synthesis%20of%20zinc%20oxide%20nanoparticles%20using%20plant%20extract%20pdf In PDF document text
    • http://files.hamptoncommunitykinder.org.au/uploads/1/3/1/6/131637056/8391510.pdfIn PDF document text
    • http://files.nhtelephonemuseum.org/uploads/1/3/0/7/130775649/6148523.pdfIn PDF document text
    • http://sonako.technifusion.org/uploads/1/3/2/6/132682787/2629799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/problem_based_learning_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/463754761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/12308245964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6671/2479/files/beginner_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/improve_your_english_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/assembly_language_programming_of_8086_microprocessor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/2051712792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/8374887146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/44246930612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/72051105522.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F7 5552 bytes
SHA-256: 05c6f0f7c64f044fae8b68c654be68efabed2dfdd6ba62b9f19ce46856311af9
font_01_sfnt_off00006be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE8 10528 bytes
SHA-256: e798eee58c72bb230fb65813325efe66bc43741fb9f9eddc3b24cb68045bc8cd
font_02_sfnt_off00008fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD0 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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