Malicious PDF — malware analysis report

Static analysis result for SHA-256 84405c7d05b1bbff…

MALICIOUS

PDF

51.2 KB Created: 2020-09-01 21:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 438e0fc6cf58c54d7d134e5fc2c14e00 SHA-1: 4b97e09effc84479e8988126960972c0d3115b2d SHA-256: 84405c7d05b1bbfff6c9fcd80ce9778ef254f41818719ddda08a615b894b9a2a
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, disguised as a free download lure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed for SEO manipulation to attract victims. No scripts were extracted, but the primary attack vector is the malicious redirector.

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/wix?keyword=fur+elise+piano+sheet+free+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/191a6d_7b345768e78a48b19418089df5f42253.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/822ecd_e5d265c31db04e548ce6e81a0099b07f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_97d3df522ca3497f83e214402bf74fbb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/45297351142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/16124326945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1741/2501/files/vedalabekunavolil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/cutting_edge_knives.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_492497955d6049b1af9958149695b4b1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d08a0134108a41e787762ba4e8b11739.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d1f7a7240fc547119f6dc051bed9310f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e43cd70dca8b46ba9686f78f1d9aba3d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000727d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 5084 bytes
SHA-256: 71701baa52eb87c6960dd0bfbf9420492cb57be88204a3d210a7593b13a80ffc
font_01_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 11684 bytes
SHA-256: 105ea6283c3718b21e0f01389fcb1c3c969b297d3bf433e49c5362d6afc81e96
font_02_sfnt_off0000ab07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB07 16076 bytes
SHA-256: 007377d672ad35e960bd13d3f92b574e68300ebd174b34df27fa78aa6545cdcd

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