Malicious PDF — malware analysis report

Static analysis result for SHA-256 15910ebefe384d34…

MALICIOUS

PDF

34.8 KB Created: 2020-08-03 08:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34be7fd88a0d1ac212d79f5514caf38c SHA-1: bf3ad0a43f550e4727da7edabca336ffa189682e SHA-256: 15910ebefe384d346cbf0aa0657dc7c336b83a713b28a236067129be47739a2c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link T1059.007 JavaScript

This PDF document contains a malicious link disguised as a manual, which redirects to a known malicious infrastructure. The document also hosts a large number of links to other PDFs, likely as part of an SEO farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness, and the embedded URLs point to a redirection service designed to lead users to further malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=chamsys%20mq80%20manual In PDF document text
    • http://files.divinedishcatering.com/uploads/1/3/2/6/132681992/vasefojim-zilojaj-nunifuzi-davuzaxaxagat.pdfIn PDF document text
    • http://files.gravitysuccess.com/uploads/1/3/1/4/131453650/xumenibasibirep.pdfIn PDF document text
    • http://files.evangelismfireministries.com/uploads/1/3/1/8/131858791/9106861.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/1/0429/8273/6031/files/guxaxomikobepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/91273972485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/boposi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/1416290375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/zezizefinumaguvanotanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/sorakajefirit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/57748070301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/8756195156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/17598506551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/panepovaxi.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 7

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_off00004bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEE 5300 bytes
SHA-256: 5900f3b9a9ba2e4b144d60ee60da5c6f07d9a520798415746fb99a47d3ea389d
font_01_sfnt_off00005dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 9676 bytes
SHA-256: 1be71cd544dd67ce4bb739265fc87e90b1e4509fa430b4782afb0e7c81d910d8

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