Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e53440967f7acac…

MALICIOUS

PDF

35.1 KB Created: 2020-08-08 02:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a78ed5378cc816395051d63780aec332 SHA-1: e1e71f1349878465f6e447d3ad2029b45bbf9d18 SHA-256: 5e53440967f7acac560daf5769297eafec70d93203d0be887dc07095f5154431
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of numerous PDF links suggests an attempt to create a link farm or distribute malicious content, likely for phishing or malware delivery.

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=avivamento+sustent%25C3%25A1vel+pdf In PDF document text
    • http://wumimepa.anaestheticchecklists.com/uploads/1/3/0/8/130874431/e18a76.pdfIn PDF document text
    • http://files.mtairyvillage.com/uploads/1/3/0/8/130814411/54e94.pdfIn PDF document text
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdfIn PDF document text
    • http://files.pstransport.net/uploads/1/3/1/3/131397973/wipagakenag.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/1/0431/4228/3432/files/bosquejos_expositivos_para_predicar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/agile_scrum_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2461/2508/files/pupufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/latizizagekawizowovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/bidigurugavoxukemumajas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/upload_to_google_sites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/faniradopolidemurupumebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/79870181387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/62491667231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/46304547427.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_off0000480b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x480B 5372 bytes
SHA-256: 3c3513c4d0971f07ae9b0663d195a2285985a3fda3efb3a9fd570733f34255b0
font_01_sfnt_off000059c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C1 12068 bytes
SHA-256: 040c52a2eee028570b2f321e7de104f9225d6ec4e5b86f926c6308258689fa1f

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