Malicious PDF — malware analysis report

Static analysis result for SHA-256 540374ac424b5ad4…

MALICIOUS

PDF

37.8 KB Created: 2020-08-28 00:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69c5544dac18336758702fd377009729 SHA-1: 379938d4684c4751620ca5ebd4b12dabeb98c1d2 SHA-256: 540374ac424b5ad4e440f71bd3b7a71dadc099f606c62cc1727ac4d2713dbfb0
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.com/pify?keyword=tieu+ngao+giang+ho+2003'. This URL is likely used to redirect users to a malicious site. The PDF also exhibits characteristics of an SEO link farm, with numerous links to other PDFs, suggesting a campaign to distribute malicious content or phish for credentials. No scripts were extracted, but the embedded URLs and link farm behavior strongly indicate a malicious intent.

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=tieu+ngao+giang+ho+2003 In PDF document text
    • http://files.freshmediatt.com/uploads/1/3/1/4/131437599/wozewuzawuvev.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/1/0433/0687/7080/files/duzibuwusupamodugibeboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/turkey_bird_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/volkswagen_app_connect_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1596/8680/files/62212606109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8593/0402/files/68528411303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/zejedusataluzimejetaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/xibigipavusixovebafavivib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/aditya_birla_mutual_fund_android_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/dizibitagaxotov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3279/7607/files/zibafozezixetirur.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
🗂 Part of campaign: freshmediatt.com 3 samples

Related samples 2

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_off00004860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4860 4148 bytes
SHA-256: ff83deef2c97b08ecdcf1e3dc8fb85dd56473619ffa90972ef2a1f444fa135c6
font_01_sfnt_off00005703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5703 5028 bytes
SHA-256: 586930c595c885803e357ddd9ebb55fc5b9b9ff8e61b33595a71b6d959885fbe
font_02_sfnt_off0000681d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 10400 bytes
SHA-256: f82758d8dee57a98bf62168f46dd90f6a9ffe48d254a7c5d84cec72ffc0e3484

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