Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d85110e9efab37e…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 05:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df789f9bfbd801627faa837f562b8237 SHA-1: ebea8d118c9e2bd805e94e2f210ebf7bef110b54 SHA-256: 4d85110e9efab37e9c24d7e39e807409223e7bfebeff2ff2ab036c2a03077668
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary malicious link identified is 'https://ttraff.com/pify?keyword=multisyllabic+words+3rd+grade+pdf', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful destinations.

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=multisyllabic+words+3rd+grade+pdf In PDF document text
    • http://files.teachingkidstothrive.com/uploads/1/3/2/6/132682076/bobasat-mogefivevupo-nezeboga.pdfIn PDF document text
    • http://files.teamsoho.org/uploads/1/3/1/3/131380942/pojekul.pdfIn PDF document text
    • http://files.blessensation.com/uploads/1/3/2/7/132710763/e20feeb0d9602c.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/1/0435/2419/4468/files/bokuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5282/6777/files/78896173994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/ripitem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/49571655629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/www_tinymoviez_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6446/7357/files/82865041308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/air_cargo_management_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8333/files/vixuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/xexel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/65924930441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/povitinodumukipavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/81301326048.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 4

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_off00007421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 5824 bytes
SHA-256: 14cc98c25e28bef7dacbc13552c9c8b69980f4a005d6fd9563f2a433ceba727f
font_01_sfnt_off00008824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8824 10720 bytes
SHA-256: f58f4b91e596cf439e76aceaf90380ead68447b9a78c4a51610dc74718ac13fe

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