Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33da9a0d18aab65…

MALICIOUS

PDF

56.7 KB Created: 2020-08-14 22:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f801430af4d3e7387aa19799db63c6c SHA-1: e109c7df31d052adf1c768a69e5b3b086008962b SHA-256: f33da9a0d18aab6511c02d31138edcbd401b4deda28c2cdb947a235267f98fcc
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 external PDF files hosted on various domains, including Shopify. One critical heuristic firing indicates that a link within the document redirects to known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same redirect URL and a link to a benign-looking PDF on Shopify, suggesting a lure for free tutorials that ultimately leads to malicious content. No scripts were extracted from this sample.

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=cinema+4d+basic+video+tutorials+free
    • http://files.independentbaptistmissionforjamaicaandthedominicanrepublic.com/uploads/1/3/2/6/132695301/5969774.pdf
    • http://files.capricorncetaceansproject.com/uploads/1/3/1/8/131856185/ranitemexajosa-damoxig-zepelaz.pdf
    • http://files.ccplus10.org/uploads/1/3/1/0/131070845/solesivesat.pdf
    • http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdf
    • http://files.internationalradioartresearchgroup.org/uploads/1/3/1/6/131637484/ladosunenapados.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/wonut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/89019159625.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9647/files/velikarufidepajevutodax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/sufifedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/78361366896.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/26875145969.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_off0000937f.bin
9651b59070d5d27664b4786c1a7bc05429bdc50e6603dc62a580a097d08d32ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x937F 5360 bytes
font_01_sfnt_off0000a5a4.bin
708e7f6d31ac8ddfdb6fcc9b0bacbace982e10a5178bacfd440067f40c7e2751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A4 10100 bytes
font_02_sfnt_off0000c82e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC82E 4324 bytes

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