Malicious PDF — malware analysis report

Static analysis result for SHA-256 23effa7994cef43f…

MALICIOUS

PDF

52.0 KB Created: 2020-08-06 05:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1a528ed75b79d1b9ef66e0559c4d941 SHA-1: 2d67668509f7fcea4460d94fde654aa711adc2cd SHA-256: 23effa7994cef43fced2f0fa345d98817d46314b28a434f5de6ef2b9f9ed3198
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to attract users searching for specific book titles. The primary redirector URL, https://ttraff.com/pify?keyword=my+english+book+class+4+pdf, is flagged as malicious and is used to obscure the final destination of the download links. This suggests a phishing or scam campaign aiming to distribute malicious files under the guise of free educational content.

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=my+english+book+class+4+pdf In PDF document text
    • http://files.teamfitnessonline.com/uploads/1/3/0/8/130813357/7888941.pdfIn PDF document text
    • http://files.battlekatpdx.com/uploads/1/3/2/6/132695531/3075235.pdfIn PDF document text
    • http://tipijodi.calvertcanines.com/uploads/1/3/0/7/130739024/mudakuzugugaku-wapus.pdfIn PDF document text
    • http://wodok.universalhighways.com/uploads/1/3/1/8/131856725/4647359.pdfIn PDF document text
    • http://files.colusalafco.org/uploads/1/3/2/6/132680784/f159e4238c80e99.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/1/0433/5802/7928/files/prioritization_delegation_and_assignment_3rd_edition_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/ayushman_bharat_programme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9007/4016/files/zonapogoxumoxob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/sama_veda_translation_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/bujojisaxufivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/tuxodivanak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/muzowodufevimuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/91608333875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/sefudamotoramejumepuxefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/23118150272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/ginuletofajapigibaxi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B33 5720 bytes
SHA-256: 6d1e356bee43d3f3b1d9f662c8cd1b834a03b41fbf093b31b5f2cf091485555f
font_01_sfnt_off00009ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED1 10864 bytes
SHA-256: ed6915ccac5e13718e188e1edfac4d269261ce2c1d8f48c91fee8c16df8896df

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