Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cd565ba16d47eb…

MALICIOUS

PDF

45.0 KB Created: 2020-08-23 19:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c9bcfe367a79757a698f1dd2608b336 SHA-1: e5aadfc0fb559f9f5b861786bfe8c3208e21b5d5 SHA-256: b3cd565ba16d47eba86227cc892399302d74d067d33f051e70f0ca6345e734c0
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, masquerading as a 'Cheetah keyboard 3d app' to entice users. One of the primary links, 'https://ttraff.cc/pify?keyword=cheetah+keyboard+3d+app', is identified as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous external PDF links suggests a link farm or redirection strategy to a malicious destination.

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=cheetah+keyboard+3d+app
    • http://monemagi.juliekgrayphotography.com/uploads/1/3/0/7/130775388/238ebe5fb01.pdf
    • http://files.noticeandwonder.com/uploads/1/3/2/6/132695714/71aa2c2a1343edb.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/dionysius_the_areopagite_mystical_theology.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/furupifexenudul.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/juzawofatexidale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/41709909656.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/escape_double_quotes_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/tizatabilubur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/64059668515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.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
font_00_sfnt_off000059d8.bin
b49b4f9d4eb62fb36cb446816f34de4b0b24ba03d6cd368fc414cdf848955767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D8 5212 bytes
font_01_sfnt_off00006b88.bin
5d5fa55d3157addd2974db5a0bc1f8a091fac42573c0d58a0876074896c209c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 10616 bytes
font_02_sfnt_off0000901e.bin
4fb18f2f8d176c0c9ddf893a3a69c6eaaaf8ae8309617b6e07033971a2ed751b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901E 16684 bytes

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