Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf22002cac4f20fd…

MALICIOUS

PDF

62.5 KB Created: 2020-08-19 22:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8054c944cab8aa15328ee07281af6d9 SHA-1: 9970f8cdb4cd370c3d7b896ee3607f62f47a8e3e SHA-256: cf22002cac4f20fd72292ab1f1a68e7a01252bb0d3f26128d13ab23ea839b4f5
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body contains the redirector URL and several other PDF links, suggesting a lure to external 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=transmissible+spongiform+encephalopathies+def In PDF document text
    • http://files.lordsperformancehorses.com/uploads/1/3/0/9/130969489/nuzilenigidab_sekib.pdfIn PDF document text
    • http://files.robleggeconsulting.co.uk/uploads/1/3/0/7/130738912/kigeguxa-xedefu.pdfIn PDF document text
    • http://files.therusticacrellc.com/uploads/1/3/0/7/130775304/4846230.pdfIn PDF document text
    • http://files.bluefernbedandbreakfast.net/uploads/1/3/0/7/130739789/suvusekowadudivifupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9100/8419/files/kiwike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/xerubepemegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/resumo_sobre_autismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikumakosesik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/extend_adobe_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/xejogukulagifidodoponemez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/fupeviwarobutigarasaxek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA920 5448 bytes
SHA-256: 6e243f1de0515a35f1a62e29a752fac5dfb422609f71dea64c30c3e416089024
font_01_sfnt_off0000bb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB65 10292 bytes
SHA-256: db1a03c7998dcd130508ccb502386869e1b682ddec5a7a7476089b8ecb93b7d5
font_02_sfnt_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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