Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4b3fba1b47ec7a…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 02:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06254f93f0280e7b361d99ee22af5c24 SHA-1: c2b967c17c5be1edb2de4c30ee579acb1c9cbf8c SHA-256: ae4b3fba1b47ec7af6efbf788691ba376dce48ec478bb789fd665c403c77264c
196 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector infrastructure identified as malicious. The primary malicious URL is https://ttraff.ru/wb?keyword=leed%20ap%20bd+c%20exam%20preparation%20guide%20. This behavior is consistent with a link farm designed to drive traffic to potentially harmful sites, likely for SEO manipulation or to host further malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://files.brandhero.in/uploads/1/3/0/7/130738673/mobobelosefen.pdf In PDF document text
    • http://sesonu.keymagiamusic.com/uploads/1/3/0/7/130740522/7223965.pdfIn PDF document text
    • http://files.fionamatisse.com/uploads/1/3/1/8/131857419/7966270.pdfIn PDF document text
    • https://ttraff.ru/wb?keyword=leed%20ap%20bd+c%20exam%20preparation%20guide%20PDF link annotation
    • https://ttraff.ru/wb?keyword=leed%20ap%20bd+c%20exam%20preparation%20guide%20(v4In 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/1/0431/1531/5351/files/vermeer_sc252_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/rabelexad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/74927933504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/44078689378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7322/2294/files/65614731698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/73129166751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/xodawenolugedaguzeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/34368307483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/rewajuzesisorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9259/9193/files/zegitepavokokito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/dadomuzikajomugofelit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.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 8

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_off00005e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E32 5716 bytes
SHA-256: cb5ffd55d285328af15afb17902323c6663b9c1e06eacc1fca951df219620917
font_01_sfnt_off000071b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B9 10856 bytes
SHA-256: da2ff499c8cd6fb92b009fc2483b63fd52e2524fcb43ae2758761111f1081532

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