Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d5a0e0bb7e31fd…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 22:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c4c704fd62a399236b887089bffa64d SHA-1: 33f2ddd536e28e284a7000df9f28726571fc1102 SHA-256: 85d5a0e0bb7e31fd8b7560e873da536c7ec7d41c71a2034c615a8d7da1aec675
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of links, many of which point to a redirector service known for malicious activity. The document body itself is heavily obfuscated but contains a URL that is also present in the link farm. The primary purpose appears to be directing users to malicious infrastructure, 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.cc/pify?keyword=absceso+tratamiento+pdf In PDF document text
    • http://noxemog.gopherstatefire.com/uploads/1/3/2/3/132302963/genirobesijosavobina.pdfIn PDF document text
    • http://files.guadalupemed.com/uploads/1/3/1/1/131164120/takunivopusigo.pdfIn PDF document text
    • http://files.suncitylibraryfriends.org/uploads/1/3/0/8/130874115/wafulapizawudek.pdfIn PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131408954/7905468.pdfIn PDF document text
    • http://files.denveralpineclub.com/uploads/1/3/0/9/130969446/6287509.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/1/0430/2965/9797/files/82039157886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/borudinajukafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/cathtrisme_cardiaque.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/rikot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/98376428177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/fuvaxojupaxirekejol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/mutodutesatovavazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/6929153647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/18740034096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/vafolugegezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/zilotesobopejanaxaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5184 bytes
SHA-256: 9b4cfd8c940b3bff74bff08f309e3137adc2974859ce539b1e44590e1506e4a8
font_01_sfnt_off00007ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 11472 bytes
SHA-256: e5a3a4633bb41312c921f8438fe8d6fb46eb29ca7fb33752f4baacde3caf0d5a
font_02_sfnt_off00009f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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