Malicious PDF — malware analysis report

Static analysis result for SHA-256 1748ef09ae53045b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 16:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 12389b9fcae4c9d681feafb7270a170e SHA-1: 0cfdd53a91ab00f8afb7f333073fe588b8dc8ab2 SHA-256: 1748ef09ae53045b686b910685771384d18ed954d83e0b3733b4ae600de2c1d6
194 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to an SEO redirector, which in turn leads to various PDF files hosted on Shopify and other domains. This pattern is indicative of a link farm designed to attract users searching for specific documents, such as 'mathematics questions and answers pdf grade 12'. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms a malicious intent to funnel users to potentially harmful 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.cc/pify?keyword=mathematics+questions+and+answers+pdf+grade+12 In PDF document text
    • http://files.montenegromotel.com/uploads/1/3/2/6/132683154/2093393.pdfIn PDF document text
    • http://nejegog.sharadslunchbox.com/uploads/1/3/1/8/131856318/nezipijinufetojadu.pdfIn PDF document text
    • http://bimil.fresnotreeservicecompany.com/uploads/1/3/1/4/131483371/1978acb5.pdfIn PDF document text
    • http://files.alittlebitofhappy.org/uploads/1/3/1/0/131071114/7463915.pdfIn PDF document text
    • http://files.sitimeline.com/uploads/1/3/1/4/131453054/palukinazikolete.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/1/0437/6828/3298/files/beethoven_pathetique_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3345/0903/files/41193000416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/37747425974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1781/9544/files/special_occasion_speech_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/mepofuzinibujizejubapoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/xevarokib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/wagukudaraxiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/48782683577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/26125028729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/radatamuporaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/papuzosuloxekufesit.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
🗂 Part of campaign: fresnotreeservicecompany.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BE 5944 bytes
SHA-256: fec0b4d5a9a4abce95389e564f7dc39b338eaa5d160eaec96f3cd44a76ecfea4
font_01_sfnt_off00007aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 14880 bytes
SHA-256: 801e5dbe00ccd1731ced461490b150e4818ae37bbf23863bf69c994a127d9eed