Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb1461e3cc915d4…

MALICIOUS

PDF

47.5 KB Created: 2020-08-16 13:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8830de2b1cccc29db4f2ff5183f02d98 SHA-1: 95d63c68ec020f611be65597e9acb6029bcf9e94 SHA-256: 0bb1461e3cc915d41a7ad19cac71cebd08665b9a895edb2987fadd0753c9d66d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) disguised as a 'biochemistry study guide answer key'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links, including a link farm, further supports this assessment. No scripts were extracted, but the embedded links are the primary attack vector.

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=biochemistry+study+guide+answer+key In PDF document text
    • http://gababen.michaeldalberg.info/uploads/1/3/1/4/131453574/jaxezulune.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/1/0434/9755/4084/files/63659725612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/jesaguvororu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/lilowoduset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/lebisewejosiraxamopix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/wozirepenifafesuxutajew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/80072104161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/heather_rock_of_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/80693647531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/84615475141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/1201774986.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 1

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_off000079c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C9 5628 bytes
SHA-256: c886bf4df63340ebf871617dcc09eb2ddc3a382371848810407eff8e07e43249
font_01_sfnt_off00008cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD6 10760 bytes
SHA-256: 38e5d55dcc4759918c0fbc10613694c8fa3066cc24c8648fbda82dd5a452f5ef

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