Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a7bf98d674b6b1…

MALICIOUS

PDF

39.4 KB Created: 2020-08-01 14:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6df73ebe0c935970f6f8087e46937aeb SHA-1: 77e0844a09ae62adb4d3bbd813b9182c63f0df7e SHA-256: c3a7bf98d674b6b1ab21c26de94a3f32e7929d37abd6dc5e27d80103142a3e75
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com and ultimately redirect to malicious infrastructure via ttraff.ru. This indicates a phishing or redirection attempt. No scripts were extracted, and the document body was largely unreadable binary data, limiting further analysis of specific payloads.

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=string+equals+java
    • http://files.sophiasoasisforequines.org/uploads/1/3/1/6/131637190/8695636.pdf
    • http://files.portoconference2018.org/uploads/1/3/1/3/131379868/pemimubo.pdf
    • http://files.231fusion.com/uploads/1/3/1/0/131071067/7954523.pdf
    • http://files.marketingmanusa.com/uploads/1/3/0/7/130775354/8789562.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/kipemaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/99409901924.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/73491780977.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/fosalixumid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/19837668075.pdf
    • https://cdn.shopify.com/s/files/1/0437/9901/9682/files/40964262447.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5114/files/12666710291.pdf
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/86243427879.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/wutegikebujabefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/dumatejugarebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/54483089746.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_off00005c28.bin
dca727dfcc5b5596957734811a11bbe4abf84e340e44879946b5052a49587fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C28 5220 bytes
font_01_sfnt_off00006e01.bin
74dbb219e6de2e2bdbfd2ec00136795e2dbe3a26d2a4dcf5d9e617a1b51dd77f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 10272 bytes

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