Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8ca53b035787af…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 01:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a905f244e9d4017708e4aea01470cf39 SHA-1: d339f04daa2e33f26867051904d9f833143305ea SHA-256: cd8ca53b035787af6d4dfd381c9e2e3f46b2b8a8bd950c0ab04396476fd2d596
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, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.club/wix?keyword=dark+cloud+2+georama+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDFs hosted on Shopify, suggesting a lure to a malicious site.

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.club/wix?keyword=dark+cloud+2+georama+guide
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/8191224071.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/11043515311.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/zaluwavuguboxopevafak.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/63773521509.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/95282716921.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/wipamonovodasesatafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/80358754264.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8d42a2cdc334486ab30289d205be209.pdf
    • https://static.usrfiles.com/ugd/b8c837_db8c6c37836142628832b224ca873684.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2922f2e2c864870b739e3a005f8cb08.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/88740669076.pdf
    • https://cdn.shopify.com/s/files/1/0434/4594/4481/files/zujixotew.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_off00006172.bin
d56d6f2cb3d782a511ca7ccd42e2f7ad6cff5a9bb6176690bfd28328ab0b7c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 5276 bytes
font_01_sfnt_off0000734e.bin
24944001d4ed0aa3880f362d00c1ae78d2dccd5251e62485a7c08d8e4c46cde9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734E 10200 bytes

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