Malicious PDF — malware analysis report

Static analysis result for SHA-256 633f236ba2389230…

MALICIOUS

PDF

40.6 KB Created: 2020-08-24 17:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4baab96b3afe746cce10a06985e5e59 SHA-1: f78e260ac4702f329fe99c85466a49ea28188e9f SHA-256: 633f236ba238923098503c1ab1842c5353f92a214d7cb0d00570689ba6be1d9d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains multiple heuristics indicating malicious redirector links. The document body, though heavily obfuscated, contains URLs that lead to a redirector service, which in turn points to a link farm of PDFs hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=diabetes+in+pregnancy+nice+guidelines+pdf, which is designed to lure users into downloading potentially harmful content.

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=diabetes+in+pregnancy+nice+guidelines+pdf In PDF document text
    • http://sexukuz.bernadettehopkins.com/uploads/1/3/2/6/132680903/8879860.pdfIn PDF document text
    • http://files.ollrichva.org/uploads/1/3/1/8/131871416/7593451e614be4.pdfIn PDF document text
    • http://xawedi.jagartsupply.com/uploads/1/3/0/7/130775934/jewedok.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/1/0431/8488/1825/files/81590985146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/roll20_spell_macros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2244/9820/files/ackerman_steering_mechanism_project_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5882/2296/files/wulebatusiperejomusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2096/3227/files/lezazarukevefiwajamufino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/89376990394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/30591691929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/69229990918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/calculus_of_variations_maccluer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/40086395028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6377/0274/files/buzz_lightyear_shirt_template.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_off00005f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 5564 bytes
SHA-256: 255becc4bfc69b9073ecc90bd32bd74095567b7533e124098ee90625e4976c4e
font_01_sfnt_off00007294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 10288 bytes
SHA-256: 5dbb96dd7fa9e2b2dbcd08ba093255342e7e2261b6633fca41743958dc86ceba

Open this report in the interactive analyzer, or submit your own file for analysis.