Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ecbab5ba6c1a2b…

MALICIOUS

PDF

33.4 KB Created: 2020-08-26 13:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2efe42eb082b672265396568e21ddbe3 SHA-1: 2fdf9a8ce889b6fc82e23527bf096aad6ad02164 SHA-256: 09ecbab5ba6c1a2bb61599cb6e28182e32e3fe66abaf3997e56f057a53cb5cae
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.ru, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm or SEO poisoning attempt to increase visibility.

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.ru/pify?keyword=convertir+coordenadas+geograficas+a+utm+inegi
    • http://pudude.discoverybayyachtharbor.com/uploads/1/3/0/9/130969060/sawuvug-novukurir-giwovibaxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/39910104027.pdf
    • https://cdn.shopify.com/s/files/1/0446/4685/8915/files/liwewadivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7317/files/veruzopinedeleva.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/assembly_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/nusuwerujomiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/bepevusuxulebaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/17988901336.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/zuvadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/44271397893.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_off000044f0.bin
5b00926173e263d9a9e8c06a027ac250ee42ff4816d11a98b4ce7e48f4d524eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F0 5276 bytes
font_01_sfnt_off000056cd.bin
b1784869969bebed3b4b84dd78939cb02b1385612eb85e975a28dd6673a48c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56CD 10048 bytes

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