Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdf866d9287ed7a…

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 23:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cea853b70f5151b8de312d85771a46df SHA-1: 5b5a7776b470941953e8008f17b06c337529b1ef SHA-256: 4cdf866d9287ed7acf6f0fb09e17454dc059e8a5a52be2461904460fd6597080
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (https://ttraff.com/pify?keyword=dwarf+wow+classic+guide). The document body, though heavily obfuscated, contains references to a 'guide' and the malicious URL, suggesting a lure for phishing or malware delivery. The ML classifier 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.com/pify?keyword=dwarf+wow+classic+guide In PDF document text
    • http://zarefasa.psurochester.com/uploads/1/3/1/4/131407995/5d00e43cc.pdfIn PDF document text
    • http://files.cincyfirstladiesforhealth.org/uploads/1/3/1/4/131437515/2907859.pdfIn PDF document text
    • http://zixawika.rockmybling.com/uploads/1/3/1/8/131857315/lajuzobesadukogaj.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/1/0440/1112/6942/files/bonurevuzetorinikixud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/duzorijim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/95466924883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/sonolupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/zesoput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7231/3749/files/67264734930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5740/2276/files/lubavuzapasoxumoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/23777191982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/bulewofakeketosasidisale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/27585424935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/guidewire_claimcenter_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/talimomakudi.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 2

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_off00007d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 5280 bytes
SHA-256: 066bdc523e338c8442c090f03787418249bb6b81675b00789f69cee6777c84c1
font_01_sfnt_off00008f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F81 9968 bytes
SHA-256: 2a2404103c60d5a379ede4968628fc5d37bd5f654d8c1bcc31bb0c127390f5f4

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