Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e43a1b529c6cede…

MALICIOUS

PDF

63.5 KB Created: 2020-08-17 02:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 283daefa1aa73113f72a70d35f74f5be SHA-1: e27ad5320baa6512276ad9efe04cef45c5d122f9 SHA-256: 5e43a1b529c6cede8a33d4eb53860323d9540d49754f3383baa93e4da8610479
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, all pointing towards a phishing attempt. The embedded URL and document body text explicitly mention "cataloguing rules pdf" and link to a redirector URL, suggesting a lure to download a malicious payload. The ML classifier also strongly indicated maliciousness.

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=cataloguing+rules+pdf In PDF document text
    • http://files.benjaminsmithfineart.com/uploads/1/3/2/7/132740778/bda5c0dc689c834.pdfIn PDF document text
    • http://files.bethahatch.com/uploads/1/3/0/9/130969032/tugitafiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/nofozisipokubof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/hillsong_worship_songs_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2215/9772/files/atomic_number_and_mass_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/bodmas_questions_for_railway.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/xevejikemugupadisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/30748962244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/mofetojom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/bizakew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/lekaxejuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/gofekasizujezalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1660/files/thinking_skills_critical_thinking_and_problem_solving_free.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1F 5112 bytes
SHA-256: e271bbca6acbca41a2c14a9c36770aec2f8153369884e295117daa11b3a1ca2f
font_01_sfnt_off0000bc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC94 11900 bytes
SHA-256: 40789a090a95fb29ca78b38d15672f2f5296e072f22cbda8eb2e33559070c4c2
font_02_sfnt_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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