Malicious PDF — malware analysis report

Static analysis result for SHA-256 442fb302e9ae41c1…

MALICIOUS

PDF

35.5 KB Created: 2020-08-14 21:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 292ab0efe9f098846e63b90dab8e913e SHA-1: c404f2cdb6972e9734dd1da235a42ba6150b910b SHA-256: 442fb302e9ae41c15c7441d9d5436a27890714d4964005d0d70f8c32d26cdbb0
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary URL, 'https://ttraff.com/wb?keyword=essentials%20of%20business%20driven%20information%20systems%20pdf', is flagged as a malicious redirector. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=essentials%20of%20business%20driven%20information%20systems%20pdf In PDF document text
    • http://zafuf.gazetteevents.com/uploads/1/3/1/4/131438477/sebepa.pdfIn PDF document text
    • http://files.radboardsport.co/uploads/1/3/1/4/131454766/gufoberovofavon.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/1/0440/3717/7494/files/putoleda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/freedom_of_religion_apostasy_and_islam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/61734392518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/45532576752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/babulal_nagarmal_satnalika_foundation_scholarship_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0912/1184/files/pambansang_bayani_ng_pilipinas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/diablo_2_sorcerer_builds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/91240743518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/the_love_dare_for_parents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/9331099022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/uniden_5._8_ghz_cordless_phone_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/22582097922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/nujes.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 3

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_off00004c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C80 5444 bytes
SHA-256: 7fea34217c6ac51f0ae053457a5eec0ad85e8d3ad348aa883ab45f56954de1eb
font_01_sfnt_off00005ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF1 9808 bytes
SHA-256: 2f76df469c0b7d9d5acaabbeaafad272f0d805461b90e6c26022e0d4173ea39d

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