Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0a9a8c4d3de1be…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 06:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ac1d444fc6b4c111380ba9852686d4e SHA-1: 552ba173dc1702299f392166a9d0ed1f26620d9b SHA-256: 5b0a9a8c4d3de1be34937c9645574d4f3d3a3a2ba5e42cf1f4a61bdda88dd5ef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as free downloads for textbooks, but redirects to a malicious infrastructure at ttraff.com. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of an SEO-based phishing campaign. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=understanding+computers+today+and+tomorrow+15th+edition+pdf In PDF document text
    • http://files.sarnetfl.com/uploads/1/3/2/7/132740375/eeecd2ac200fc.pdfIn PDF document text
    • http://files.therisingstars.co.uk/uploads/1/3/1/6/131606109/6942774.pdfIn PDF document text
    • http://videzegiv.santacruzmasters.org/uploads/1/3/1/8/131856462/jinomew-sufoli.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/1/0434/3706/4344/files/dojonijabenitisuzis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/kagesifegubugexoluvoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/altruism_questionnaire_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/gekefupetezopulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/1_99_woodcutting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/kirakejuxumijofaxodorir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/pokemon_ultra_sun_route_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/94716720738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/gta_5_lspdfr_calloutsv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/74715212025.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_off0000684f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684F 5900 bytes
SHA-256: e320ac907fe642eca785253a28151df4ad3e914c6b97331f5076b7b9ecde3cae
font_01_sfnt_off00007c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C67 10156 bytes
SHA-256: ed906f86d7bb456d5420200f0ccc5fb78ca3e52e0b0c697c17078e6e2bf9c494

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