Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb0be2be5b592c7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 06:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1e1c4886b72e9d42c92643ec2af8829 SHA-1: f4612712cbd349bfd68cc1afe531b903c2141bb3 SHA-256: 4fb0be2be5b592c73d47c3f7c631fb6c157af45b01456709f0d3c85c187cb45a
194 Risk Score

Malware Insights

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

The PDF file contains numerous links designed to create a link farm, with a primary redirector pointing to a malicious URL. The document body, though obfuscated, contains text related to 'a to z animal name list pdf' and a URL that appears to be part of a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful 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.ru/pify?keyword=a+to+z+animal+name+list+pdf In PDF document text
    • http://files.prairieprecisionsteel.ca/uploads/1/3/1/6/131606874/86177f6.pdfIn PDF document text
    • http://files.glogodsloveonly.com/uploads/1/3/0/8/130874023/5919930.pdfIn PDF document text
    • http://jiteg.teashopyyc.com/uploads/1/3/1/4/131407901/8566e8f29881a0b.pdfIn PDF document text
    • http://files.fyiexpress.com/uploads/1/3/1/3/131383619/3833906.pdfIn PDF document text
    • http://files.tntdeesign.com/uploads/1/3/0/7/130738823/kexiju_warikaxuxu_difanakutikepo.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/1/0429/6926/8373/files/81612060872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/fotilugun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/nezugokimekituzulanaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/65869092368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/4t65e_transmission_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0461/5066/files/92508143400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7326/4030/files/mathematical_proofs_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/relexibag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/95169523039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/92967544112.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 5

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_off00006b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 5132 bytes
SHA-256: c43d3a0190feb999826d1462ee0ee25dbe6316b2b8fc364e104194b4f76ef5eb
font_01_sfnt_off00007c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 10280 bytes
SHA-256: 57527fa964f51521311d235aba649c3a2b0fa336f86b8774e36c3e67e996bade

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