Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfc780eb84e8d68…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 03:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59ab4e181aa85cd9baa0cfcd70235dd0 SHA-1: 66e9e5256fdd0bc10dbeacd10a76076b8cebc69d SHA-256: 4cfc780eb84e8d68053546c8e2f032f9864b752be1a47f47a8abd8ea5530b571
162 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 identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free flower border for word document' and the malicious URL. This suggests a social engineering lure to trick users into clicking the malicious link, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=free++flower+border+for+word+document In PDF document text
    • http://files.michellecobbin.co.uk/uploads/1/3/1/6/131606605/vetukavevugu.pdfIn PDF document text
    • http://files.fortworthfirevolleyball.com/uploads/1/3/2/3/132302780/xelolarotagexu.pdfIn PDF document text
    • http://files.krvbrugg.ch/uploads/1/3/1/4/131453278/5427573.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/1/0427/8065/5775/files/tabigotezotunoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/2143854298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/86042760545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/87007678600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/musevokujokalawusovagaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/co_operative_housing_society_bye_laws_2020_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/atul_prakashan_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/measurement_system_analysis_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/8021/4678/files/85485665148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6364/7131/files/98388537585.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 7

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_off0000601b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 4968 bytes
SHA-256: 1e4fdabd1a0e2323ef7b6f1d85e7f511706a7976c850c907356f07b8caf5390c
font_01_sfnt_off000070fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 10444 bytes
SHA-256: d86bfad06907576567d12fd186b1448e51475c4c2b620451a5e9bd13da6c0935

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