Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90497af8a975a72…

MALICIOUS

PDF

32.8 KB Created: 2020-08-16 00:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e25713adadf64c3389be3e362af7922c SHA-1: 74b0f9f2b205f7f3b36e45582b423220ee431af6 SHA-256: d90497af8a975a72586ace3e2c3995bb5f305c2c204832ef4b2f1c15acefbe1f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown domains, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to external sites through these embedded links.

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.ru/pify?keyword=wi+dot+medical+examination+report In PDF document text
    • http://files.levelctactical.com/uploads/1/3/1/4/131409884/sedekotuvutisuzi.pdfIn PDF document text
    • http://bebesafaj.ourcreationsdesigns.com/uploads/1/3/1/1/131164250/7938243.pdfIn PDF document text
    • http://files.francescagracenutrition.com/uploads/1/3/1/4/131438071/dufogiru.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/1/0431/9651/4461/files/exodus_bible_quiz_questions_and_answers_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/characteristics_of_a_project_report_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/60667353209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/breeam_vs_leed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/kakaluvapesupisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/86534296651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/jitus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/jawapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/50236248852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/pikigotetadowolanivin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/4855731246.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 3

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_off000043f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43F4 5124 bytes
SHA-256: d5fb06d68424be35fe6337ee81981bafd98e4ed14a47972ebf365ad681bdb073
font_01_sfnt_off00005552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5552 9600 bytes
SHA-256: 8339778a8bfea53ff2fb2f4f4ffe899991119e6af250ac426d269d72ea140789

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