Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a0dab23c8c08c9…

MALICIOUS

PDF

50.5 KB Created: 2020-11-07 13:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c6081394de51a6eae0888bf97d7490d9 SHA-1: 1d2362f3fa1ad2258ed98a4c989b378c813b6cb2 SHA-256: 47a0dab23c8c08c9ccda9e599ac4a09dd690ea3500b6429c7fd776f11015f203
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm. The embedded URL points to a redirector that likely leads to a phishing or malware download page. 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://traffking.ru/123?keyword=word+within+the+word+list+19+pdf In PDF document text
    • https://ziwavolenexajid.weebly.com/uploads/1/3/4/5/134503628/455956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5f9ea8e575354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8e12658bb7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f8c40b1e6a0e.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/51757835072.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/mla_song_citation_in_text.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fa086eae640b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f8a49607bdbe.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/british_english_received_pronunciation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_5fa3848f4b19f.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/lazetipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000871f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 5232 bytes
SHA-256: 5b081938b86c11dd4330cafae8227be087562e1959c17e28206006bda6c07a51
font_01_sfnt_off00009904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9904 10628 bytes
SHA-256: 858854718ed40a7d35f5c4b5149c1885caa610edc8a8466d5ee1000576e5ff3a