Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbf5d15a4a6fffe…

MALICIOUS

PDF

56.3 KB Created: 2020-08-17 00:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afbde9a1c91ba056d3e087eff029d94e SHA-1: 4e6b7e9b1f90a0be426ccb1d62e4900a502bb0d3 SHA-256: fdbf5d15a4a6fffefab4b33baae2905ca6e2964375eb0eac2686f6125e69677a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One prominent link, 'https://ttraff.com/pify?keyword=functional+programming+in+java+book+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to lure the user into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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=functional+programming+in+java+book+pdf In PDF document text
    • http://files.shukokaikarateclub.com/uploads/1/3/0/7/130775654/c6bbd0ac9798.pdfIn PDF document text
    • http://files.breakicemarketing.com/uploads/1/3/0/7/130775698/giluzowe_joxoluvijezexeb_sisefuxi.pdfIn PDF document text
    • http://files.packerpottery.com/uploads/1/3/1/4/131483098/nituvaxefazuz.pdfIn PDF document text
    • http://files.katetaylorhewett.com/uploads/1/3/2/7/132741099/4487786.pdfIn PDF document text
    • http://pulep.lifewithsqueaky.com/uploads/1/3/0/8/130874222/a44bcfdd1cf7.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/1/0441/0051/8040/files/concise_biology_class_9_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/22358972168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/fuzekogilivudedumovem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/fabivokatuvojemofili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/cement_pipe_manufacturing_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/36813591125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/42641324914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/soturubuwuzivupokufegiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/46387987011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/ataxia_cerebelosa_aguda.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 6

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_off000094bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 5592 bytes
SHA-256: 831c10ccd0ad7c7f508a71e966d5f34aaaa1661f8a9ea36b2e45644bf2a6e09e
font_01_sfnt_off0000a7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B6 14028 bytes
SHA-256: 40fade9691c0f8a6613727d06177bb8aa70c20e06450fd7fbb28734a9f60f44d

Open this report in the interactive analyzer, or submit your own file for analysis.