Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cd279720ddfbdf…

MALICIOUS

PDF

56.4 KB Created: 2020-07-29 00:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98e3f13e0926d2ac7216a31acfe35d3a SHA-1: 6bb34c09d3fe4fc87d94bc20b917bd2ee80b8c92 SHA-256: 85cd279720ddfbdfe100e005f2e37224723f0c2a8640715663ffa8d5ce65cec1
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to health symptoms. The presence of many PDF links suggests an attempt to create a link farm or distribute further malicious content.

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=dolore+alla+schiena+e+formicolio+alle+gambe In PDF document text
    • http://files.manoliskaratarakis.com/uploads/1/3/0/7/130738940/64ad6e1a45f92d.pdfIn PDF document text
    • http://files.aawcphilly.org/uploads/1/3/1/3/131380850/pewub.pdfIn PDF document text
    • http://files.heavenonearthlove.com/uploads/1/3/1/3/131380604/tinom-kividigew-kipaseroxasev-paziz.pdfIn PDF document text
    • http://files.univ.ency-education.com/uploads/1/3/1/8/131872021/panugofowaz.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/1/0435/3641/6936/files/68672654522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/kelolufonaxuvupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/nodojuvavuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7220/9574/files/5553208867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/19688950879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/gobofiguwuvofeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/92688505538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/73372216618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/6703694450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/zunakuwo.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 3

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_off00009d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D04 5140 bytes
SHA-256: bfea7a62cbc6a8e133032297b47a4c7195262327b985430d37ac89401b20398b
font_01_sfnt_off0000ae44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE44 11228 bytes
SHA-256: b15cd0d56ed66a64b867b7b7a18f9a71a4682f3191b0ceec3419b29e7c4d3812

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