Malicious PDF — malware analysis report

Static analysis result for SHA-256 af44eabed0b653f8…

MALICIOUS

PDF

40.2 KB Created: 2020-08-22 03:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d29fa080ab01947b071a476248d8bf9 SHA-1: f753a24b7ef7dfb0e81ed5a94489038f2caa330e SHA-256: af44eabed0b653f8aa609a8f422658365f4f91385a8f61b27e0f3e74607f5ff3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to further malicious content. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs hosted on Shopify. This suggests an attempt to manipulate search engine results or to distribute malicious content through a seemingly benign document. No scripts were extracted, but the presence of malicious URLs is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=worksheet+about+letter+d
    • http://jafin.tryonkiwanisclub.com/uploads/1/3/0/9/130969723/ranup.pdf
    • http://files.ctechmotorsport.net/uploads/1/3/2/6/132682802/jafabulawuveza_ginugujanivori_xakikizopuku_xejaviripavug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/73771015713.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/47494482491.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/lokavibix.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/motinifugoxuvip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/37440073330.pdf
    • https://cdn.shopify.com/s/files/1/0462/7457/6533/files/rojeputenusebafujitumex.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/47375095088.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/95716472273.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/vince_advanced_language_practice_chomikuj.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005faa.bin
5a1e60b23664fdaeb0bf077667375b32d9fb02c8379281315906326200fd3b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 5132 bytes
font_01_sfnt_off00007122.bin
2a1a7916a8a89fae4db07f50538780e7d8bed9231fc92d2b98132350a415670b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 10364 bytes

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