Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc4eb087c0d1649…

MALICIOUS

PDF

39.1 KB Created: 2020-08-23 00:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 128ad1adc2128fc5f8fbef9068f73189 SHA-1: 52101657f24b1a4e638260f00b6df3d0b2338322 SHA-256: 0cc4eb087c0d1649eadcf68bcad2a40ebbf2b5f3b8535b9d9009e809d32a4909
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a malicious redirector, disguised as a note-taking guide. The heuristic firings indicate that this PDF is part of a link farm designed to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead users to potentially harmful content, likely for phishing or malware distribution.

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=annotated+bibliography+note-+taking+guide In PDF document text
    • http://files.bluebirdagllc.com/uploads/1/3/1/4/131455621/sadisado.pdfIn PDF document text
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.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/1/0437/6081/2189/files/70105256443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/87461821432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/tratado_de_bucareli_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/pevul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/god_answers_our_prayers_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/kingdom_rush_vengeance_level_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9344/2208/files/23427901352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/wow_classic_mystery_meat_recipe.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_off00005b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6F 5368 bytes
SHA-256: dbdbffcb805c82cc3a2996d2fdc810f7a9c82480a2f593e7e006d134abe2ebed
font_01_sfnt_off00006daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 9992 bytes
SHA-256: 8674117f2d7f7e254c33afa343f4e1bd0ef28fd82c8f34da372b43266e66c880

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