Malicious PDF — malware analysis report

Static analysis result for SHA-256 597b65e2616f12d1…

MALICIOUS

PDF

32.3 KB Created: 2020-09-19 14:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48bcef94602dffdf07cd7608950d89e3 SHA-1: 063cc46b7810fa8b4246b9f0234b416ba83e1a66 SHA-256: 597b65e2616f12d1e5a70318ed4cf835873f4e1674edfed13da1feee20e84671
184 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to a URL offering a 'free wifi hotspot apk'. This, combined with the presence of numerous other PDF links, suggests a link farm designed to distribute malware or lead to phishing sites. The document body, though heavily obfuscated, contains the same malicious URL and other PDF links, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=free+wifi+hotspot+apk In PDF document text
    • http://sevev.covefiinvestments.com/uploads/1/3/2/6/132681542/32a83412.pdfIn PDF document text
    • http://files.bodyledge.com/uploads/1/3/2/7/132740278/8190514.pdfIn PDF document text
    • http://files.summitbuilders.us/uploads/1/3/1/4/131483603/sipowoboke_juvujo_sokunemidozukok_vojute.pdfIn PDF document text
    • http://files.dcsportshall.com/uploads/1/3/1/8/131871740/617610.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1abf650-ac7e-49cc-b8ea-9dd1ec465251.filesusr.com/ugd/9904c2_6f3b6ddc77204553bbe6c01397374c1d.pdf?index=trueIn PDF document text
    • https://b4a77c22-e45a-4cc4-9a3f-3a4baec0ddfc.filesusr.com/ugd/5e8de6_0d500f7669f5465fb1f93afe946407bb.pdf?index=trueIn PDF document text
    • https://4a850197-ba94-4117-adff-717316a850f9.filesusr.com/ugd/1d64af_a66d4671de254e839ea35470f9a86ebc.pdf?index=trueIn PDF document text
    • https://e51cd099-8037-426f-a592-6546ed35e700.filesusr.com/ugd/f96b02_d3c04171cc454735b5ad7de21bc4e65a.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/suvemipasutetakujax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9382/files/advanced_vocabulary_and_structure_practice.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 3

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_off00004188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4188 5068 bytes
SHA-256: 59f843b4d9664e813cce0494113fd82a010dc5545059fbe1c341ddff01710838
font_01_sfnt_off000052d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D6 10060 bytes
SHA-256: ec6ae9a8f29abeade8c6ab6ac70d9963d3b48214577d43de33c038ec06fe9e54

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