Malicious PDF — malware analysis report

Static analysis result for SHA-256 8909ae956f095dfc…

MALICIOUS

PDF

50.0 KB Created: 2020-07-31 21:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2bab1a692248ad48a081ddb67851b43 SHA-1: a59a1319e655220375e7571969a39dce4d81f182 SHA-256: 8909ae956f095dfcd80209c1dbe54af49ccca970d1da89c4032e3c296fe68246
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a link farm designed for SEO poisoning. The document body and heuristics indicate a lure to download software, likely leading to malware installation or credential theft. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms a malicious intent to lead the user to a harmful site.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=download+idm+full+cack In PDF document text
    • http://files.rolfkrahnert.com/uploads/1/3/0/7/130775806/4489846.pdfIn PDF document text
    • http://files.feathersalliance.com/uploads/1/3/1/6/131606492/rixik_joxawobife_kofido_xogixo.pdfIn PDF document text
    • http://files.deltatechindustrialpark.com/uploads/1/3/0/8/130814783/nowibadebu.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/1/0431/5535/7852/files/wavimomiginu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/masuzuwiposan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/40487481871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/40882580353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/82977753513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/ketexuzawijotidosoren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/19998314203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/96115615926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/70832931488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/82828587943.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 5048 bytes
SHA-256: 77a5b6157c67b88d7a9142f5bb3beec5ef1fa1ca25ec3a6a107ecae13f196f96
font_01_sfnt_off000078c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00008151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8151 10540 bytes
SHA-256: 644196376b91ac4900ebecce73137d6c796732c215dbcd22355e1e2c5dbecc67
font_03_sfnt_off0000a4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FD 16376 bytes
SHA-256: bc7e3f6831be34686de02ce7be2a06b9f1fa2b1a298201cd6e3dc3baf4672bf7