Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4cc97a79159c75…

MALICIOUS

PDF

48.2 KB Created: 2020-08-08 01:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37c8243260824cc9c6a80db8ceedf2e8 SHA-1: c92582e959e72372b2845f424cb7745c2e2746cd SHA-256: 5a4cc97a79159c756a0ab7013815a494ea3e322315f9f8ccc0606f9e97f93dc4
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 for redirecting to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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=que+es+auriculoterapia+pdf In PDF document text
    • http://files.quillcbd.com/uploads/1/3/0/7/130776254/bipoxumunuluf.pdfIn PDF document text
    • http://files.slantsystem.com/uploads/1/3/1/3/131380337/9c47c4e65a81a.pdfIn PDF document text
    • http://files.shoprebelmagnolia.com/uploads/1/3/1/4/131437464/8500229.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/1/0431/6289/4495/files/87694435901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8009/5646/files/66599456244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/574702255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1147/1520/files/76198321715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/starting_a_business_in_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/vukejol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/94234795907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/pujegotuzefusoliwuwif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/318_207_9557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/18024342924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/chemistry_a_molecular_approach_third_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7593/files/29918421177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/rabodarog.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 5

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_off00007b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B00 5212 bytes
SHA-256: 16884f11ed41920bc2762b3cbd27ead55d77c250ed21aba21f0e778f554482c4
font_01_sfnt_off00008cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC8 11420 bytes
SHA-256: 7273e97bef97978a7a5ac33f90792affe0ffe9ad5d94db16a295dfc9bd968bbc

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