Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdad7ea5cf2f462…

MALICIOUS

PDF

38.5 KB Created: 2020-08-08 07:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c687bdb61b89b02d9cb8c57474d424b SHA-1: 3c1ab48704b3c94b2575c63f948d75c6d22bc609 SHA-256: 0fdad7ea5cf2f462fff0d4dab44a599ceb43bbddf06e516d73a4820ffeb366a9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to trick users into downloading malicious content. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=bestiariusz+s%25C5%2582owia%25C5%2584ski+pdf+chomikuj In PDF document text
    • http://files.arunabhasengupta.com/uploads/1/3/2/6/132682716/1359087.pdfIn PDF document text
    • http://files.gonzalodeamarante.com/uploads/1/3/0/8/130814192/9815767.pdfIn PDF document text
    • http://files.abileneptsportsrehab.com/uploads/1/3/0/8/130874583/d1d2b52cd742ee.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/1/0431/6332/0471/files/nebabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/0105_que_banco_es.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2241/6029/files/bsc_3rd_year_math_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/bise_lahore_9th_class_gazette_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/92217173340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/gigofalobip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/payroll_accounting_journal_entries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8747/9455/files/samururipigijina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4461/5830/files/ximosutumevogulax.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 2

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_off0000547a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x547A 5876 bytes
SHA-256: ed1be6a32922b59d354cfcfcdba7b92f7a8e617fcbfd8dc2b2feb4b21b5b3657
font_01_sfnt_off0000683f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 11380 bytes
SHA-256: 245ab16597830e52b8143b3be7fdc82584f879737fa88001ebb7d89598bbe7d6

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