Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f377a9d551bf234…

MALICIOUS

PDF

33.4 KB Created: 2020-08-25 17:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e0624ef0b09a4bffecc61660a4028d0 SHA-1: fa94e4c81cc16c2ebb86ab9a50a588b86907cef1 SHA-256: 9f377a9d551bf2342745ecc0ff6767da444921d4fbaed2fd99e8f43e33d7393e
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains numerous invisible links, including a CAPTCHA-themed lure and links to a known malicious redirector at 'ttraff.ru'. It also features a large link farm pointing to other PDFs hosted on cdn.shopify.com and various other domains. The document body is heavily obfuscated but contains the primary redirect URL. This suggests a multi-stage lure designed to lead the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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=whose+uncle+graphing+worksheet In PDF document text
    • http://files.rachelmariephotography.net/uploads/1/3/1/3/131383837/zijal.pdfIn PDF document text
    • http://gimijegew.melvinmorsemd.com/uploads/1/3/0/7/130776102/jutetanezavonako.pdfIn PDF document text
    • http://xidik.wheatgrasspublishing.com/uploads/1/3/2/6/132680981/e547940.pdfIn PDF document text
    • http://files.snow-channel.com/uploads/1/3/0/8/130813330/nimoj.pdfIn PDF document text
    • http://files.ok123plus.com/uploads/1/3/0/7/130775712/ratetedijibasen.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/1/0441/0572/8152/files/bozenawulijavidefopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7402/2550/files/abbyy_transformer_plus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8574/9665/files/26593952587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/68365082365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/60069866814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/kawabeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/mizikikilugezonab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7710/8647/files/gsa_captcha_breaker_free.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 8

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_off000045c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45C5 5364 bytes
SHA-256: 8ed2137326eb6684c96e286a9a283133ae9d85b49bf29325e483835ae2d810a5
font_01_sfnt_off00005814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5814 9548 bytes
SHA-256: c45561da4168ec428027e2adf07166add06661354bf4e7dc62a057ead359b24a

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