Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8340d4e57c36148…

MALICIOUS

PDF

41.5 KB Created: 2020-09-16 15:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03c36b058a444bc81a05c287e572b8a5 SHA-1: 79baca6a5ad9b876caa58171d787415df540a6ad SHA-256: f8340d4e57c36148f50dfb1413f4ca463087a785b605c2ddb080333b32c08a5d
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm, indicating a spam or phishing attempt. The embedded URLs, such as 'https://ttraff.ru/wix?keyword=minecraft+middle+school+math', are likely part of a campaign to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=minecraft+middle+school+math In PDF document text
    • http://files.kilrushns.ie/uploads/1/3/1/6/131636651/xupaxisomo_nopatu_kilikujuramax_beraje.pdfIn PDF document text
    • http://zalapiwa.deckleedgeco.com/uploads/1/3/1/6/131637814/c3e5c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e555c66-c733-4bda-8595-e34f8dd3db30.filesusr.com/ugd/d43733_d835b02a09dc4030b8f9c82b8828b194.pdf?index=trueIn PDF document text
    • https://70c59834-733b-430b-a8ef-7ac1fa6bff43.filesusr.com/ugd/b56239_e0e154d8f7994e8e94d37cc93a42e453.pdf?index=trueIn PDF document text
    • https://93489786-82ea-4745-87b8-9377a8decd65.filesusr.com/ugd/c722c2_d39b0cfd0d674df998d0cb1c639d29b3.pdf?index=trueIn PDF document text
    • https://d3bc46a1-fc9e-497d-b119-330a09bc411e.filesusr.com/ugd/dcf311_e8605753c149440c998640087f599523.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/android_emulator_linux_genymotion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/99699379956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4353/6552/files/operations_with_rational_numbers_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/mamawego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/concerning_hobbits_flute.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 2

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_off00006543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5264 bytes
SHA-256: 06b21e0f59637c86f81708b5c94e8a8afe6481f1c985228984a509243b11684f
font_01_sfnt_off00007708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 10248 bytes
SHA-256: 260ed530cee031e913490e17fd5e9caad29083ade52e02a8baa648cdc9ef011a

Open this report in the interactive analyzer, or submit your own file for analysis.