Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7da664dc91e07d9…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 23:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f56a1ab38fd3973ee89f9ed4518ba7 SHA-1: ea115320f942e601fb8b1ccc8a0d6b75ab419d02 SHA-256: f7da664dc91e07d98032faee09959fc5af24af060d9c1b315830c6eaf9918c1c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body contains garbled text and references to technical documents, likely to disguise the 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=arm+cortex-+a53+datasheet
    • http://files.athletesrecycle.com/uploads/1/3/0/9/130969527/8773112.pdf
    • http://files.road2fullframe.com/uploads/1/3/0/8/130813643/27ad95b0273b95.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3831/files/87911071252.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/nipojeketopofabenukumaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/18272595379.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/60733630785.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/hornady_reloading_data.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/xagixajoxuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/40765261694.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/antimicrobial_resistance_articles.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/app_to_convert_website_to.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/89902867883.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/27700254253.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/77353441854.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_off00005ecd.bin
4b5a8a04d7bd15f63b06563afbfc949ec875d67f2e768b3c7b3331bf4aa4f3b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 5524 bytes
font_01_sfnt_off00007171.bin
e3377db3ea5e523f28e7e9b516e3083a4e0368405b7b53c32ba9ea4f9cdf69e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 15576 bytes

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