Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce92dd1009de2e2…

MALICIOUS

PDF

38.6 KB Created: 2020-08-25 11:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49859df6558b747c19ff756aa6f1289 SHA-1: 6f7ef14918ea1efd49d78248ad98594de7d78361 SHA-256: 9ce92dd1009de2e20e2143cf5b4bafb7479b5b9152cb2b532da68e63b79bce6e
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for 'Block craft world mod apk', directing users to a malicious redirector. The primary malicious URL is ttraff.ru, which likely serves as a gateway to further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure is consistent with SEO-based link farming for malicious purposes.

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=block+craft+world+mod+apk
    • http://mojisexu.hacobian.org/uploads/1/3/0/7/130739783/16827ef865.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/derijuwosajapomefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/nasm_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/80773552959.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/97985699108.pdf
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/autumn_leaves_jazz_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/2642/1672/files/nolipekawotaranufibir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/xuritexakoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/palutekuxitadoxav.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/97130377844.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_off00005212.bin
a90cb4222e1b0cdf5d32853e93bcd522e9e008bc62f6fd9ed55e9bc999656dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5212 5328 bytes
font_01_sfnt_off0000642d.bin
1a7db385e37e5529c91bf22167a3701451d37cae2656674b23e7f53d69281005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 13144 bytes

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