Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc850ed4b9602625…

MALICIOUS

PDF

44.1 KB Created: 2020-08-04 19:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72a12fa0a6cd7f17e07a8f74ccd3456f SHA-1: d10cf1ab0b88103bbccc7e394526d7246538dae7 SHA-256: cc850ed4b960262538e1af89921b2b0ad579572ce719705166057a031e001c89
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=public+speaking+pdf+drive'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains text related to 'public speaking pdf drive' and the authoring tool 'wkhtmltopdf', suggesting a lure to disguise malicious links as legitimate documents. No scripts were extracted from this sample.

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=public+speaking+pdf+drive In PDF document text
    • http://files.wjcreativestudios.com/uploads/1/3/0/7/130739524/ec93ca34ed31075.pdfIn PDF document text
    • http://zipek.abcd-apartments.com/uploads/1/3/1/4/131438379/xedigufom.pdfIn PDF document text
    • http://files.stpeterswhitstable.org.uk/uploads/1/3/0/8/130874668/mobulotulugi-worirovewiko-gijazez-lokufitore.pdfIn PDF document text
    • http://files.sfoshibori.com/uploads/1/3/0/7/130739116/bezapizu.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/1/0430/2897/1674/files/baponomajixuson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/uplifting_primer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/ronakutafinonabebulavir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/aoc_g2590px_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/voltage_controlled_oscillator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9856/9888/files/bizixonezed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/fake_drivers_license_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/2584536090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/poxukagez.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 6

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_off00006d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 5588 bytes
SHA-256: 4cc9613e4c0f30dfd01f9d908be4a29f851d42232cf093f62ebac09495827104
font_01_sfnt_off0000803d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803D 10300 bytes
SHA-256: 0d1bf925d2846efb5e47661c8d34a1672c104b1d2615878a7054b8c2a0445e59

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