Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec50311bf8681d0…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 23:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4703920f50f43808045c11fe74484ba7 SHA-1: 1e5f8661793dd306d502076a5fb32e45056df0e5 SHA-256: 0ec50311bf8681d05af4a41d6e25ca4e27b92a2301e98e25a1e55a30324bc0b0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'printable addition worksheets for grade 3', indicating a social engineering pretext. The presence of multiple Shopify links, some confirmed benign and others unknown, suggests an attempt to blend malicious links with seemingly legitimate ones.

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=printable+addition+worksheets+for+grade+3 In PDF document text
    • http://lumega.rompenni.org/uploads/1/3/2/6/132680813/4089578.pdfIn PDF document text
    • http://files.compromiseof1790.com/uploads/1/3/1/4/131437924/seluk_depenezetena.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/1/0436/0860/4829/files/izabella_camargo_reporter_globo_news.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6388/3429/files/31853350235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4430/5046/files/26071848240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/rixunikowafabudebasar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/a_current_affair_intro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/kovalajesonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/72586909259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/36743351540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/87946380045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/error_reporting_php_none.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/63119009245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/basic_civil_engineering_gtu_book.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_off00006773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6773 5632 bytes
SHA-256: 6575ad420ff0252dcba1824f0b997a6a76ab9825a56181df5b207d2026dadc0a
font_01_sfnt_off00007a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 12096 bytes
SHA-256: 09d58ed9d31243fd20537a3f4e7d67f6123e4f45f7f32de72e9a3a040daed037

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