Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1aaf193ce554fd…

MALICIOUS

PDF

43.8 KB Created: 2020-07-28 00:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c48c435101578fdfdaede10d3a0aeb9d SHA-1: 3bc2e7b65fe42735dc057cefbfdcd4b7d53694e8 SHA-256: 9f1aaf193ce554fdb21a6c7f3e7b629ded21bfe7bcb5e33d1dc3bfe0956a3faa
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to an 'invitation letter template for uk tourist visa', suggesting a lure. The presence of a callback phishing lure heuristic further supports the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=invitation+letter+template+for+uk+tourist+visa In PDF document text
    • http://files.goteamkate.com/uploads/1/3/0/8/130813054/jirunowiris-kerolak-gemekuta-todazunumozuwi.pdfIn PDF document text
    • http://files.hopeviewpto.com/uploads/1/3/2/7/132711966/sitivu_tuberivefozeb_fafev_womosaxit.pdfIn PDF document text
    • http://files.lauribenblattconsulting.com/uploads/1/3/1/8/131871992/8502216.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/1/0432/4481/4500/files/morotilanisoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/sufogevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/babasetaxoguvivowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/74753379686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/laniwasanudezudagenepixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/vesonijerofulodosuleledow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/jatagikuderebolubezixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/xizexakekefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/36841081348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/nitomufaxasun.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_off00006dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 4992 bytes
SHA-256: 28e4e8c71f6405e22cca1a36fe5f8c15563a71859d46d9832e925058e8d62d18
font_01_sfnt_off00007eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB3 10368 bytes
SHA-256: 98ec5515af90acde54cf987f3415a8cefa444e6dbae4ed60a7e6bab02e41769b

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