Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2efd5e381918bdc…

MALICIOUS

PDF

42.3 KB Created: 2020-08-04 00:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c82153498bb8028ff3afb620989e8cc4 SHA-1: 5ed8a43516111218262825ab8eb21e7c68558a77 SHA-256: a2efd5e381918bdc03da5523f852413eaf254589647cbd30cc49806f87ee964f
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a lure to download further content. The PDF_SEO_LINK_FARM heuristic indicates a large number of similar links, likely for SEO poisoning or to distribute the malicious payload across multiple domains.

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.com/pify?keyword=water+and+waste+management+system+pdf In PDF document text
    • http://files.easccourse.com/uploads/1/3/2/7/132712129/3344208.pdfIn PDF document text
    • http://teralufar.gambiarising.org/uploads/1/3/2/7/132740805/9696264.pdfIn PDF document text
    • http://files.iphonerepairllcmccomb.com/uploads/1/3/1/8/131856195/tasilorejofebuduf.pdfIn PDF document text
    • http://files.polizzigenealogy.com/uploads/1/3/2/7/132711983/bulajuwek-fovesefixo.pdfIn PDF document text
    • http://files.leonardopallenberg.net/uploads/1/3/1/4/131437689/6731352.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/1/0430/2517/0595/files/31959281020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/42470326463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9074/7293/files/12343609753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/fexesozefosopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/rotukubakogetirolunoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5105/6285/files/46092769958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/39700420491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/columbus_day_bank_holiday_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/tekizuvojosubamozej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/54441650265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/25089916659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/96283551598.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000663e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 5536 bytes
SHA-256: 7f2cd838e5dc65b01bfe08a7cd10f39a4a89ebaadb3e7728d0b353c823250c68
font_01_sfnt_off00007921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 10360 bytes
SHA-256: 9d6ffce3cce7977640fbabdb58e2cb14f9c47b025b5e5cee27a11d1c5c988b73

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