Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1b48d0713a3859…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 01:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31cf6511ad96dfdc88ba087bda1b7dc2 SHA-1: f091b4c0c3be76b6c11060adb6b6ca904ffeff54 SHA-256: 9d1b48d0713a385939685d57a425142e96d0c1f6a24570d5fa255406a1da36af
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=block+websites+on+android+tablet', suggesting a lure to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=block+websites+on+android+tablet In PDF document text
    • http://rapezifo.astrinidislab.org/uploads/1/3/1/3/131380284/5098767.pdfIn PDF document text
    • http://files.gillpolo.com/uploads/1/3/0/9/130970004/remodosumibudo_ledoguzax_limebale_zazawe.pdfIn PDF document text
    • http://files.jeremydhoward.com/uploads/1/3/2/7/132710497/167005.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/1/0429/1428/3686/files/riesgo_financiero_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2503/files/zizumuxuxusipazepomapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/59228102920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6493/4043/files/business_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/ielts_writing_task_1_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/4485033023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/wadakifexediwiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/22435255134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/dusapuxupozegipux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5824/4257/files/luxifosugokoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/2719648247.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_off00006c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C08 5276 bytes
SHA-256: 9039b4fda70aab97b77e0e89e383892fc882b3ca1700650e8784c44819e85ced
font_01_sfnt_off00007e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0C 11112 bytes
SHA-256: 1651d265c61e1c3d10c7c1cc3f6de269ba1700291069695032a3e8c484327845

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