Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bd8f60b1671888…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 17:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e21540896001e0b0773436df972e4de1 SHA-1: 7bd48900c7e6d6eeb17256f9b2ee2cf838665cdf SHA-256: 81bd8f60b16718889b63a64f961271a1477e9dffe607ebf46d89f3933b126c45
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service designed for SEO spam and phishing. The primary redirector URL is https://ttraff.com/wb?keyword=properties%20of%20parallel%20lines%20practice%20pdf, which likely leads to a malicious payload or phishing page. The document's structure and link farm indicate a tactic to generate traffic and potentially distribute malware or harvest credentials.

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/wb?keyword=properties%20of%20parallel%20lines%20practice%20pdf In PDF document text
    • http://files.alexvietti.com/uploads/1/3/1/3/131384552/zakugekobe.pdfIn PDF document text
    • http://muloziji.haveyoueverserved.com/uploads/1/3/2/7/132740405/barubumejexejof_vadakegef.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/1/0434/0311/6709/files/95011168273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/69717907624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/rekulusazoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/nazetadamovawumuseguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8140/8416/files/mikagipot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/49908074797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/6959386071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/islamic_calendar_2020_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/how_to_install_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8405/files/kukexumejifawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/luvivukagexebuxusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/wonediwino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/wezelalu.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 1

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_off00004d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D82 5152 bytes
SHA-256: e0baa1fd6c7f91ed5ec24f5fa41f351f5054fe0f03eeeb9918fdc530c9d3e2ee
font_01_sfnt_off00005f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 10136 bytes
SHA-256: a82cafd21100a9aef5a076cba678819573ffc10f5b9096b0c04e527274a22b11
font_02_sfnt_off000081c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C7 16116 bytes
SHA-256: 8d64339dc9961633bdfa63864cda8f522c7fd744259f4fd1b6783eb703aa00e2

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