Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6aa0cc7fbf681d…

MALICIOUS

PDF

45.3 KB Created: 2020-08-29 01:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae64fbfa3919cf8b51b3065b5e4676f7 SHA-1: 90a5c4d05e76cbbd4a2addefbf2a3492f0e3e627 SHA-256: db6aa0cc7fbf681d4ca0f70ed74e17e4610465442a3a1623478cbe360b10433e
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=nlp+seduction+techniques'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=nlp+seduction+techniques
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/24044376919.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9447/files/gefemixokexadegozubaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/wiwufizefiki.pdf
    • https://cdn.shopify.com/s/files/1/0454/8503/1576/files/24582313276.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/vimamadamelafotezeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/dsl_linux_usb_boot.pdf
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/portugues_adriana_figueiredo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/durutit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/series_65_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7943/files/fonozobolebobomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/23501163490.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/bisejosem.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4aa6b03043540a28a1ca0aa45a52158.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac9312f5205b4856a04b1b900453e37e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.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_off00007429.bin
11ab4b17578c96c6056f29df60685c9c25312b4487bd0bf05cb6d3411f290284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7429 4948 bytes
font_01_sfnt_off000084f7.bin
ea6c827d8297a69028fc4b3e48d99d23b84e2538aa26758301973fb257431232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F7 10448 bytes

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