Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e47dd2749e9bb8f…

MALICIOUS

PDF

55.5 KB Created: 2020-08-26 11:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 623807d8ee77cd27ce3ff6d09904676e SHA-1: b31f983fd266951aac5a22bd08a7cf5a3fcfb9b3 SHA-256: 4e47dd2749e9bb8f6b7909ea66b827e24d78e6862e2547d4ae1e2b9d2ba2935c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, hosted on ttraff.com, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to lure users to malicious infrastructure.

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=diccionario+biblico+strong+gratis+en+espa%25C3%25B1ol In PDF document text
    • http://files.globalqualityenglish.org/uploads/1/3/0/7/130739524/jaxodajerizag_babum_bukojusaf_zomej.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/1/0441/2289/8584/files/definition_principles_and_scope_of_environmental_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/doobie_brothers_drift_away.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/81533419706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/pujonadorejedejelelugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/79038367796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/nys_geometry_regents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/beyond_good_and_evil_nietzsche_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3180/6376/files/marijijejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/49563116473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/lasasanupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/13235785213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9958/5429/files/examen_matematicas_5_primaria_santillana.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_off00008c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C35 5452 bytes
SHA-256: adf2f6b4dc70b79f48ed499247d8f58a2e7f6be4d0058f14f5de5fa69ecc5448
font_01_sfnt_off00009e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E86 15748 bytes
SHA-256: b2c387e41c87313b28f1515be3b8ca9dbbe09396ef1437bfa480ee6b276fddd7

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