Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1aeba2344f64860…

MALICIOUS

PDF

37.8 KB Created: 2020-08-22 06:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fa5e717a025d8a4b5b20c5fd8dd67dd SHA-1: 63d4f8e17b72980af2a3eacd41a1598dd66bc4a9 SHA-256: b1aeba2344f64860a39c4a50353aeda9a77c25b24821fd69cc8b1b890d68c04e
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, forming a link farm, with one URL identified as a malicious redirector. The document body is heavily obfuscated and contains a reference to the malicious URL, suggesting an attempt to lure the user to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=risk+management+phd+thesis+pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/sisivixiduwavewavumelez.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2914/files/84420508608.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/zefanozogikori.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/67375844558.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/82000447829.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3030/files/base64_to_converter_js.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/30453749886.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/27099184764.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/82430434169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.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_off00005623.bin
28822548351a067f049ca309635ad44f457dc1845c03816ec21c0c1dbf99f85a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5623 5396 bytes
font_01_sfnt_off0000685f.bin
e3847f16cbfb01e1c16d68f4b71238e2f9c6f785e322ddac48ba0481fee817fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685F 10052 bytes

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