Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffdff6c10d05b7e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-23 01:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f19226f38b083b1eed0a5918b28d985 SHA-1: 80257a8e1bcfa12ca6965511134c1b9e64a6b61e SHA-256: 5ffdff6c10d05b7e3c874fa7d9054a66a429f58fa309434391cd440eadcfcf58
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body and embedded links suggest a lure to download files, likely to deliver a secondary payload. The ML classifier strongly indicates maliciousness, and the presence of multiple external links points towards an attempt to distribute malware or phish for information.

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=character+traits+synonyms+pdf In PDF document text
    • http://files.romyservando.com/uploads/1/3/1/4/131453208/walefukuvapurorida.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/1/0428/6201/8716/files/4882623254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4564/9574/files/30604475117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6918/4931/files/anatomia_del_pancreas_endocrino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5199/0691/files/hacking_guide_kali_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/90333476265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/19948253180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/articles_worksheet_for_class_2_with_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/autocad_underlay_slow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/69854717047.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 1

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_off00005ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 5368 bytes
SHA-256: d91bd446eb66a601ed5544a247cfea39b2ad5b785c78284a95974e271cd853fe
font_01_sfnt_off000070da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DA 9996 bytes
SHA-256: 10e818476cfc0d136e762b397062505e895c451e247fedf4855298b250f80651

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