Malicious PDF — malware analysis report

Static analysis result for SHA-256 318c791bb5061f4e…

MALICIOUS

PDF

50.7 KB Created: 2020-08-18 19:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c4a6b9b1b7a9b6b52d3551b38600a45 SHA-1: 4c1fee2deedb675fe9759fbae5e792c27e801bab SHA-256: 318c791bb5061f4ef24de3785bc20881a9c3326fa1a4918ee1b6a1c47c12c380
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/pify?keyword=rockefeller+street+nightcore+piano+sheet+music
    • http://vomemiz.preisendorfer.net/uploads/1/3/1/8/131856570/verum.pdf
    • http://files.renderdesigns.com/uploads/1/3/1/3/131398406/53dc8b5b10090d.pdf
    • http://files.marcello-messina.com/uploads/1/3/1/4/131406149/rugusasirul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/tajum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/honeywell_pro_6000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/todoramupokegililomi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/gaxejoluroparajovisateduw.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/sociocultural_definition.pdf
    • https://cdn.shopify.com/s/files/1/0454/1834/8712/files/bottle_gourd_images.pdf
    • https://cdn.shopify.com/s/files/1/0434/6347/5352/files/lutez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/36798231334.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009e41.bin
c272d7c9a7f2dd90597dc47d468adc26fda3b40670d534304fa4559f54cd8a82		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9E41 18620 bytes
font_00_sfnt_off00005c3c.bin
db17577fe46dd7b69276610b7bfe3c3bbd8652b9763b09ae0a3b9fc2e4807e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3C 5500 bytes
font_01_sfnt_off00006ecf.bin
8e30f8410d12fde0984fc6bf1d834bdf8e56514852fa3da5cbe6a2d74d555d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 15160 bytes

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