Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8bd0b7816c3060…

MALICIOUS

PDF

73.6 KB Created: 2020-08-20 06:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6e969c965f2fee3e4fa3d9b585090af SHA-1: 4eb51fb0d3c2278370d479ec69a0c8e932e37946 SHA-256: ce8bd0b7816c3060dcb1ebf9b32395882ee392330056da6f2ad70f0a951ce5c3
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=blogspot+libros+pdf+gratis', which is a clear indicator of a phishing or redirection attempt. 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.cc/pify?keyword=blogspot+libros+pdf+gratis In PDF document text
    • http://zutuxe.tidewatertrailanimal.com/uploads/1/3/0/7/130740019/c783db.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/1/0451/2271/5801/files/bayesian_approach_to_global_optimization_theory_and_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/newewuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/44653804762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/kujugupota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/stokes_shift.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/20505457696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9824/7078/files/corporate_email_signature_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7185/files/windows_10_without_media_creation_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/33993579737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2862/7108/files/64829165337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/mekuraxoziles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/knee_exercises_nhs.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_off0000e2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A1 5396 bytes
SHA-256: 62a369e8bcbeed14a1bfb9ee2f8766599bf64fb27b52d4cca304970c1d4a5fba
font_01_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 10732 bytes
SHA-256: 6c2d50425022e08d8fa0c85b9066d60dbd43111c140cb516518d16f6726a872f

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