Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4b06f19ebba09a…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 21:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc9210e5e17b27d11fd04a9f61dd844e SHA-1: 5fd02e940dd84e127ae51aa9b23d90eaa3e34964 SHA-256: 7b4b06f19ebba09a42aca7be5e966d3da37c195301c9dd34b0f4726130e656e9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, appears to be a lure related to a 'Biostar 2 administrator guide'. The presence of a large number of external links suggests an attempt to distribute malicious content or conduct phishing by directing users to external sites.

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.com/pify?keyword=biostar+2+administrator+guide+pdf In PDF document text
    • http://nofufuxen.empirecityacademy.com/uploads/1/3/2/7/132740214/4581232.pdfIn PDF document text
    • http://files.mindbusterstrivia.com/uploads/1/3/1/8/131857920/7697937.pdfIn PDF document text
    • http://files.mrbalwayscare.com/uploads/1/3/1/0/131070452/8167746.pdfIn PDF document text
    • http://files.mdddssolutions.com/uploads/1/3/1/3/131383953/gutatiris-lumot-jamufojotebo-duzobegagijaxet.pdfIn PDF document text
    • http://files.angelicastrologymagic.com/uploads/1/3/0/7/130775953/nugumafafojuso.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/1/0438/1242/1789/files/php_format_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/ritobemexefep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/13809528220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/36726096286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/pizoximazerixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/38706357578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/76035146608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/gexovarum.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_off00006e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E62 5508 bytes
SHA-256: cfaeecb2dff9a251faa755bd9cbcdae7dffdab6c49003e54fb3f514317519847
font_01_sfnt_off0000810c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810C 10168 bytes
SHA-256: 06d6cc4beaacb948104ff61cb2ed0eca96a10c33df36620c0ccba366f9aab364

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