Malicious PDF — malware analysis report

Static analysis result for SHA-256 e904e8f3b3c88103…

MALICIOUS

PDF

47.9 KB Created: 2020-08-12 11:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c29fb46e2280fdcadf524936abfb81a8 SHA-1: 49d183f25d13c1d0a31a9ac8d8beaefa291b3d97 SHA-256: e904e8f3b3c88103580fd6e78e46f52392eb126d3a27726cf8cddbc9b3c9c931
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to reducing PDF size and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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/wb?keyword=diminuer%20la%20taille%20d
    • http://files.lionpridebands.com/uploads/1/3/0/7/130738720/4fde1b969b9.pdf
    • http://files.parkhilltheatre.com/uploads/1/3/1/3/131380531/9380817.pdf
    • http://files.carolagodmanirvine.com/uploads/1/3/2/7/132740237/ea9fea787a.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8263/files/allen_test_series_for_neet_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/2995313816.pdf
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/tukubijijokizelaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/2926626674.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/926604791.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/dapiruked.pdf
    • https://cdn.shopify.com/s/files/1/0437/3112/4385/files/semakaruwewopuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2359/files/fumobawojerevebapimipos.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/xazebewakabuzizokelotifo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/19323988687.pdf
    • https://cdn.shopify.com/s/files/1/0439/1357/6603/files/7414509020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/zixiber.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/eros_guide_los.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_off00007966.bin
dcac0f843caf5550be75d9dbb4ac58c0e87d0f8ff27092224ffd3273e7a6c5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 5216 bytes
font_01_sfnt_off00008b14.bin
8d2a914e50cd7c7a6a41cfd704690d00893fb08d97f80d41c155127f6494a964		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B14 11816 bytes

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