Malicious PDF — malware analysis report

Static analysis result for SHA-256 937ad625e9837a2b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-06 09:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 584548a7d823d9402b790a0b6a20643c SHA-1: 0e0583dc75f64c13c038fd488ec9b45668c76858 SHA-256: 937ad625e9837a2bc071bb486897bd5034803ffcaf4099ed5bde6d6259d97c58
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'mobile phone repair training courses pdf' and includes the malicious URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, suggesting an attempt to obscure the ultimate destination or to appear as legitimate 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.ru/pify?keyword=mobile+phone+repair+training+courses+pdf In PDF document text
    • http://files.avayogabodywear.com/uploads/1/3/0/9/130970022/5873252.pdfIn PDF document text
    • http://files.hotelsformeetings.com/uploads/1/3/2/7/132740536/152a3a00a.pdfIn PDF document text
    • http://files.steadfasttattoostudio.com/uploads/1/3/1/3/131380786/xorubedosopino.pdfIn PDF document text
    • http://tepika.wheelerchurch.org/uploads/1/3/1/3/131379730/903800a10d92.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/1/0434/7641/8720/files/financial_statement_analysis_valuation_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/9756682798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/jamawasavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/brain_on_fire_livre_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/petipabaxasifugavixal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/jetufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/ladamikuwuvosunimixofobej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/92195383886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/attendance_allowance_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/45121248709.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 5

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_off00006212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 5560 bytes
SHA-256: 7d036781c7ae03a2fe69b7895e64d059c51212d416ef38896114a5a2b6ef0cfb
font_01_sfnt_off000074f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 10736 bytes
SHA-256: 94bbcc3b8686e354675daee66cb4e4afffd6d9e794ca2d5a8af65c80b8416d1f

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