Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f71698fec75144…

MALICIOUS

PDF

46.0 KB Created: 2020-09-10 21:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01cd285296c5b5117f3bdb51c807249b SHA-1: fadac36cb30558a8344a9c737ee42e388231d1a2 SHA-256: 84f71698fec75144bb96a46ccffb9327ca335d21b242aef34467a64737b82875
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with SEO link farming and phishing lures. The document body, though heavily obfuscated, contains the primary redirector URL and several other PDF links, suggesting an attempt to drive traffic to malicious sites. 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.cc/wix?keyword=line+dance+step+sheet In PDF document text
    • http://files.stfrancisbing.org/uploads/1/3/2/7/132712222/d07408.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/1/0427/6148/6503/files/fibuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/nonegiwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3474/6781/files/biology_ecology_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/anime_school_boy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/cerebro_masculino_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/ecology_and_palaeoecology_of_benthic_foraminifera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5493/9542/files/30582278082.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/756799_31b6b8f6f0e746489094d93f09ceaef2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0511f5_3e73d83ec007491289b6bc4d1181abb7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/40336e_15e126613b754feb99953080820379ff.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 1

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000596e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596E 5056 bytes
SHA-256: fe7802f77482ae0ebe1319032e5f403ba8160cb721bea1811b2b8e74aa1829b3
font_01_sfnt_off00006ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC3 4652 bytes
SHA-256: 4da722f11e6e11c900811769ae7fc3db20762ed0c830c57787fa38ad08dda751
font_02_sfnt_off00007a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A83 10196 bytes
SHA-256: 87743c5dfe1e1c10cc7ba9a00fe5f4505fd542ea906bb99dd42792dbba879678
font_03_sfnt_off00009d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D46 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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