Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf20e6770e0867b…

MALICIOUS

PDF

56.0 KB Created: 2020-08-04 12:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4090eeec94062f41c795d96e0fa8d3cd SHA-1: d90dcba9bfe8fe89c169a8511fb8003fdde6eff4 SHA-256: 4cf20e6770e0867bf1f66c400a9a4ac88d216a76dd0af97caeac64c8340f0867
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=fighter+aircraft+design+project+pdf', which is likely intended to lead the user to a malicious site. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic.

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=fighter+aircraft+design+project+pdf In PDF document text
    • http://files.churchofgodfaithfellowship.com/uploads/1/3/1/4/131453733/2580756.pdfIn PDF document text
    • http://files.ironsistersusa.com/uploads/1/3/1/4/131414134/jemikusugusalum.pdfIn PDF document text
    • http://files.jimmydebutts.com/uploads/1/3/0/8/130813730/7271a467334fda.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/1/0428/2862/8124/files/fogewelut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3030/5175/files/bikugejefutizepezot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/71804734117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/jugoteladagedir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/81529076262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/20160544732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/zatiwuxixokirapex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/sezeregonenafazopevut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/breitling_aerospace_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/63749226668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/26433921215.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 7

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_off00009518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9518 5416 bytes
SHA-256: 6e11b7ce4b26ba50aa7855069d7a2c7eb3ae11832351c30851c38295c038ff94
font_01_sfnt_off0000a78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA78B 13544 bytes
SHA-256: a6b0e22bcaaa2ecc49b858861df2f8cef3cf144ff3c49fda61c528ca71c98383

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