Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aa3c59f003e6af…

MALICIOUS

PDF

46.7 KB Created: 2020-09-01 23:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5121fe06a0a9c7cb7ce08544b469d03a SHA-1: 5a25c1afb8eab520dd3fe5b406794394de50aaf2 SHA-256: 30aa3c59f003e6af8032821016cdb85983d18c38ca0c378dab656e198aa6c08a
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 external links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the primary links, https://ttraff.cc/wix?keyword=types+of+gc+columns+pdf, is identified as a malicious redirector. The document body is heavily obfuscated and contains the same URL, suggesting the primary intent is to redirect the user to potentially harmful content.

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/wix?keyword=types+of+gc+columns+pdf
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/19785694568.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/26565359966.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/nothing_was_the_same_download_sharebeast.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/47448947539.pdf
    • https://static.usrfiles.com/ugd/32acb1_ba8fc514d76343bbb9126ee7405e1248.pdf
    • https://static.usrfiles.com/ugd/6f53d7_e73fcd93e33244c4a7ce6f00d1068c39.pdf
    • https://static.usrfiles.com/ugd/9219f8_690c4173bc2b4003b0c7b1e83c8ccd67.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bc0202a14354e588fc094bff3d3c6d3.pdf
    • https://static.usrfiles.com/ugd/cb5dea_c50a14496afe4f71a831c442695ca09f.pdf
    • https://static.usrfiles.com/ugd/921909_1059a78121b1429a8dc5cf53989b1c67.pdf
    • https://static.usrfiles.com/ugd/9eb187_327cd30a9a5c477e908ab0fef16f1006.pdf
    • https://static.usrfiles.com/ugd/7921d2_4311f77edc454c82b6ba8220f96a48db.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_off000079c6.bin
cc3eb66cc2cc4593c01c9dd340dcfac5781f436ba98aa02126d5b06ea16bb224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C6 5220 bytes
font_01_sfnt_off00008b90.bin
6c4ffb4e8ce0f1f422fc39edc05d7327c516382cdd7fbe389bf3bab940a28746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B90 10240 bytes

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