Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5bd46689d6120f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-11 03:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f81da9e61398a144173a472cfbdadc69 SHA-1: bf91857b3931bb8b7705a59e2d92c4d8de4c9535 SHA-256: ba5bd46689d6120fd41c733518fbf7d7b857aada258feb58d287703c6ea82372
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=animales+albinos+pdf', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to contain the same URLs, suggesting a coordinated effort to lure users to malicious sites.

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=animales+albinos+pdf In PDF document text
    • http://files.ef-gsm.co.za/uploads/1/3/0/7/130740323/kegud.pdfIn PDF document text
    • http://files.annaprigl.com/uploads/1/3/1/6/131637701/474e9cafdf1c.pdfIn PDF document text
    • http://files.gfwcsylvaniajuniors.org/uploads/1/3/1/4/131407890/gijudodero_kotesusixofesib_nugaxivagojidu_duvugikoxuzex.pdfIn PDF document text
    • http://files.sagemontcc.org/uploads/1/3/1/4/131406507/pabizovas-guwedif-loral.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/1/0441/0828/4056/files/72281111006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/dufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/nixubajosesukesixivug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/8981051294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/47812865437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1926/files/ruribejutedavebifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/cdse_notification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/letter_a_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4782/8118/files/informe_de_auditoria_informatica_ejemplo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/52728452255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/dizerunumifukiwaredur.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_off00007557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 5220 bytes
SHA-256: 9aa9e97c0f8c66b3a7cf1f1e38760457c06bf6ba483f5a509eec81b6f4809049
font_01_sfnt_off000086f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F0 10060 bytes
SHA-256: cd6bf19416dc44344dd7299c191df6320bc8d19c4af382bc5e9f57f378723499

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