Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae644a22dd611b0…

MALICIOUS

PDF

36.9 KB Created: 2020-08-12 11:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20c499bd0d7e1f4b9ba61a2c90484401 SHA-1: 7f60113a9a81a9d0ae638255d0910d6dc923ecf1 SHA-256: 5ae644a22dd611b0eafd068be7af342c443a487bd20c7ebd755f5eeea8cf72ef
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to obscure the final destination and likely lead to a phishing page or malware download. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=introduction+to+cataloguing+and+classification+pdf
    • http://files.gretchenkelleywrites.com/uploads/1/3/1/3/131398560/7366450b08c.pdf
    • http://tozofexof.drowningpreventionresources.org/uploads/1/3/1/3/131383483/3ea7eba99ee7.pdf
    • http://files.hckidsbooks.com/uploads/1/3/0/8/130813612/1121592.pdf
    • http://files.skipstonepublishing.com/uploads/1/3/1/8/131871745/b4025f07fb.pdf
    • http://zumonirew.impactcommunications.org/uploads/1/3/1/6/131606255/17e03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/41155117568.pdf
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/quimica_inorganica_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/54765246517.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/jafisipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/asc_842_summary.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/lobasejojalipaxofuposulob.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/12747370825.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/28322309572.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/tabedawazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/19177532886.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/mitosate.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/ethical_issues_in_quantitative_research.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a2.bin
339b6c96d59577b884b3eed20e1e7f492911a1bd54a34e2178dd11d745348294		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A2 5260 bytes
font_01_sfnt_off00006295.bin
02b4c52e6d60ae3a9abd0c1ebc3ef98512337f0507bf8f6cf664b8dc3a77e898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 10596 bytes

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