Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ce074f2cb23776…

MALICIOUS

PDF

56.3 KB Created: 2020-08-17 08:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d154cbd3d96efd0bb5f9ba8ae3e7b1e9 SHA-1: c188ca269819bf02eb36f92fcb98ab96a4263bb2 SHA-256: 39ce074f2cb237767eaf3015dd975b9a7941839cbc4999d330d8ee8a9f879765
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier and heuristic rules. It contains numerous links, many pointing to a redirector service (ttraff.com) which is associated with malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The primary attack pattern involves redirecting users to potentially harmful content disguised as a free download.

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=saccular+vs+fusiform+cerebral+aneurysm In PDF document text
    • http://files.texasredbuddental.com/uploads/1/3/1/4/131437724/5716221.pdfIn PDF document text
    • http://files.grangertheatre.com/uploads/1/3/2/6/132695572/najosa-liludaw.pdfIn PDF document text
    • http://judiga.conservatoriumacademy.com/uploads/1/3/1/4/131437886/gokanuwefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3951/files/73162870947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1761/files/talati_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/vujaniromazanura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/29494716000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/83720696553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/nisupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/carburateur_elementaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/tewodurugofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8363/6644/files/vorenogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/rotary_lift_installation_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/luloravuzowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/29745344072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/durga_saptashati_book_in_english_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000909e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909E 5236 bytes
SHA-256: beb9a35de557041be288944da86134f495da0ac094ba10d9c92f3722d571a7e0
font_01_sfnt_off0000a249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA249 10404 bytes
SHA-256: 03e1f0fe1fce44b844b109e3f557af4290815d8397eeb82402226807e9a86e99
font_02_sfnt_off0000c5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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