Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77ec5d0fa8a05ff…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 15:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ef23f8d528ab59b9b8eb7d08ae0e754 SHA-1: e6e16ba9753ab127bf667d6156e306d790fd7801 SHA-256: b77ec5d0fa8a05ff54f3cecaed008f0f826358ce1491b209d96bbf40626a5616
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=isabella+dachshund+puppy'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded links to other PDFs, with 'https://static.usrfiles.com/ugd/b8c837_9bcecb7d8fdf497e9ad313e42fbafd4d.pdf' being one of the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting the primary goal is to redirect the user to malicious infrastructure.

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.me/wix?keyword=isabella+dachshund+puppy
    • https://static.usrfiles.com/ugd/b8c837_9bcecb7d8fdf497e9ad313e42fbafd4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_edc23c0009a0451db847f24e5f13d090.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ca450560b54881aa546c7506a69fa7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/fovokaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/lagu_keep_you_ncs.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/free_premium_templates_for_blogger.pdf
    • https://static.usrfiles.com/ugd/0dd040_930aff874a8c40fdb99704cdd62abdf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d8dc1a71c5049d3bb32f148367213dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec45ed71bece4e2e823bf572376c4d79.pdf
    • https://static.usrfiles.com/ugd/b8c837_086d2536974f4e30a82be9872f82ec84.pdf
    • https://static.usrfiles.com/ugd/b8c837_b93571abed06496fb3398a01090fb8a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_067be260fef9436f9e13c62f45bdbdf1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a988c4a4caa4cfc925df0dacb8e53b4.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_off00005fc6.bin
6c04632420e345a089a0ea59caaf28c04f4dec1159513b73209380ffdb82fc4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC6 5244 bytes
font_01_sfnt_off0000718a.bin
d4dd61207d98261d64bbf59d39ebde9eb6b48ad277088ba461179fd616ca23a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718A 10332 bytes

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