Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1328ebd7abefa12…

MALICIOUS

PDF

50.1 KB Created: 2020-08-06 23:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89e09888a58b250a62c592787f1b8fbd SHA-1: 0938e9bc13e658523f7aabad097d747f657b8247 SHA-256: e1328ebd7abefa12e4d6dcbd879c6e1053d08ee84603332851ad353f048db627
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the string 'autoradiography notes pdf' and the malicious URL, suggesting a lure to trick users into downloading or accessing malicious content under the guise of academic material.

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=autoradiography+notes+pdf In PDF document text
    • http://files.kateratliff.com/uploads/1/3/2/7/132740949/xidetavinoduni.pdfIn PDF document text
    • http://files.davidbarnes-photography.com/uploads/1/3/0/7/130776008/2563450.pdfIn PDF document text
    • http://files.wrenphotographynd.com/uploads/1/3/0/7/130739937/gojifajuwetagapu.pdfIn PDF document text
    • http://files.exclusivedancerecruitment.com/uploads/1/3/1/4/131436967/4351360.pdfIn PDF document text
    • http://files.psuthemeparkengineering.com/uploads/1/3/0/7/130775002/watusirakig.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/1/0428/2561/3468/files/29917524294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/tesutopowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/63600189155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/93921438699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/dulobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/belogovewonidivedoteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/59553273694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/antiarrhythmic_drugs_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/wagokajubamo.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 8

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_off00007e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6A 5360 bytes
SHA-256: 41e9a9a7ab6b0eba1a8b4cb10833c9820a3a33bdd5f0922da91b6d42b6719fc5
font_01_sfnt_off000090af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90AF 14000 bytes
SHA-256: a69933b8c340294f7f38d3b054fbcc8b5afbf8e241c8b5b0904ec1e29a1ca34d

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