Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dbef685974b612…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 15:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d42dabaa43999f418000b1771fe7ba1 SHA-1: 7e7f8ac433055f86f3f3e47fc12ce5e136c51cb2 SHA-256: 63dbef685974b6122457df65f95a671cf8d134fe0e63e0f0dfe39dc8a99a0d23
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a 'guide' lure, and the ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which is likely used to host or deliver a secondary payload.

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=aida64+stress+test+guide In PDF document text
    • http://files.lisamariamadera.com/uploads/1/3/1/0/131071240/8241466.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/1/0430/8379/2545/files/how_to_colorize_in_photoshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/femur_fracture_classification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/xomivavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/48549581355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/31057747429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/apa_format_citation_website_with_multiple_authors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/complete_greek_mythology_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7930/3317/files/english_grammar_in_bengali_language_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/online_movie_ticket_booking_system_project_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/54802525087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/saly_salon_games.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 4

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_off00007014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7014 5192 bytes
SHA-256: b6b22d113ebed6b615a1d26cfc0ee586a28ad1b697960fe8e3459a009b24bf9b
font_01_sfnt_off000081c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C3 10408 bytes
SHA-256: 0577ac63b3f8eaf4c540ce9f048d08b7af018331b2717c969cc70348c866a0c9

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