Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99ceaf951dbf0ef…

MALICIOUS

PDF

40.3 KB Created: 2020-08-17 11:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 56d94afc80a8ffb673f150a9817d7d3f SHA-1: 178633002d7d730a5db67521a46cb0081798bf31 SHA-256: b99ceaf951dbf0ef3caa853572e1004e3f057ef33cacbf78c26f179b35de2137
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, with one specifically pointing to a redirector URL associated with malicious activity. The document body text, though partially corrupted, includes 'Pulse secure network connect mac', suggesting a lure to impersonate a legitimate login page. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content or redirect users to potentially harmful 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=pulse+secure+network+connect+mac In PDF document text
    • http://paras.anavillaruel.com/uploads/1/3/2/7/132741555/8024927.pdfIn PDF document text
    • http://files.dutchmalinois.com/uploads/1/3/1/4/131407898/58af7db1d.pdfIn PDF document text
    • http://www.fotolia.com''gt;Fotolia.com/a'gtIn 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/1/0431/9582/6336/files/fuvumafelet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54341666742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/79776933021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/28375904841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/rewimusepil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/79990832420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0545/2193/files/pupikenavumufezamux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/4059056272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/anthony_giddens_sosyoloji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/ditukejiguzexofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/sugapupoxutibaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/qa_analyst_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/gezirolufetikunidupuxuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/portugus_para_concursos.pdfIn PDF document text
    • http://www.fotolia.comIn 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 7

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_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 5104 bytes
SHA-256: efec686b55888b89cadd027a644b5dcd0848643503b887cbf79f395c71d0aa30
font_01_sfnt_off000071a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 10184 bytes
SHA-256: 8a61462326ef9911e3252e942d4f001d45695d5e7dc9ff220e8b417bb6d6a2cf

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