Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4bd22e475a76029…

MALICIOUS

PDF

42.1 KB Created: 2020-08-04 07:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42fcdf207a00fe7a38a195d1302d6806 SHA-1: 486f97dfd6cc93b0a3025cf14cfd470607c08d56 SHA-256: a4bd22e475a76029cd866037bbe2a8142617c626b30334db119dc478f6e1d194
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to external content, with one primary link pointing to known malicious infrastructure at 'ttraff.ru'. This suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirect URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=vocabulary+list+for+1st+grade+pdf In PDF document text
    • http://files.beautydetangled.com/uploads/1/3/1/3/131380786/wonoporapezujavap.pdfIn PDF document text
    • http://files.annefeve.com/uploads/1/3/0/8/130814208/19b96d.pdfIn PDF document text
    • http://files.weirdzebra.com/uploads/1/3/1/4/131482864/9647838.pdfIn PDF document text
    • http://files.ircreads.org/uploads/1/3/1/4/131406432/jewiloxemimugazixar.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/23083433767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/4348198872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/jorewejujagidiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/xaxesonakugixewemub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1157/1865/files/61506521950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/86610203793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/30786425645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6644/8277/files/pdf_to_azw3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0760/5918/files/49590778476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/xurivawetaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/61483060321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/javascript_project_ideas.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 3

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_off00006558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 5584 bytes
SHA-256: 801b38f4b6a909b2b5a014635833e7295f8811f62cb69a0426fff9f52ba67faa
font_01_sfnt_off0000786e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786E 10316 bytes
SHA-256: 9648bd5dd368e887533dcbe2b31da99e4b66fb0f71dd80a53625f59f91c7045e

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