Malicious PDF — malware analysis report

Static analysis result for SHA-256 633bdc66d4b5c450…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 09:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0edacfe500cc510dc98b00d20e0bc6c SHA-1: 6041c6c4486001354037ef40d19596e8d0a531b2 SHA-256: 633bdc66d4b5c450fb75dbb7052442fd02c9909e5e9ce43741e0268fb22152bb
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, also contains a URL that appears to be part of a link farm designed to manipulate search engine results. The primary function of this document is to redirect users to potentially harmful websites, 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=neumonia+tratamiento+pdf In PDF document text
    • http://files.lakesidelacrosse.com/uploads/1/3/1/4/131437919/2950eff8441f6bf.pdfIn PDF document text
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdfIn PDF document text
    • http://files.mirelajoja.com/uploads/1/3/1/4/131454207/43d0ccbfa6a.pdfIn PDF document text
    • http://files.griperandriperdiscgolf.com/uploads/1/3/2/6/132696063/f29d47.pdfIn PDF document text
    • http://files.familylawyerminnesota.com/uploads/1/3/1/6/131607712/jubigi_vomikewupinoz.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/1/0433/6071/4904/files/52672252808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/87134278535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/benign_prostatic_hyperplasia_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/xurarad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/dukagaguxurukeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/57774310720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/56602004429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/basic_hazardous_waste_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/35187144263.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
    • https://medlineplus.gov/spanish/pneumonia.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6E 4948 bytes
SHA-256: b62790bf12cf74def2ae29aa5d8d5533934b2dd588db7b3d54355e1bab5f5d0e
font_01_sfnt_off00007c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 10684 bytes
SHA-256: 79426b6a317ad3e3d6a63ba1b252173d3ec2b22011f3845c3f536dc0756f9419

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