Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8dd55f28a162d0…

MALICIOUS

PDF

61.8 KB Created: 2020-08-31 23:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf4ae5a3ebf04b31dcdcaaf42de316a SHA-1: c09c7406b21d7fb7a39255a8e64f7ee457e852ef SHA-256: 8c8dd55f28a162d03bd39c22a16a42dc11cca2da49a6da94b3e801f2a35a8fd8
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of embedded links, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. One of the primary links, 'https://ttraff.ru/wix?keyword=the+raven+allan+poe+pdf', is flagged as malicious, suggesting a redirection to a harmful site. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, indicating a link farm strategy likely designed to lure users to malicious 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.ru/wix?keyword=the+raven+allan+poe+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/questionnaire_on_drug_abuse_among_youth.pdf
    • https://cdn.shopify.com/s/files/1/0465/1207/9006/files/lasasotavo.pdf
    • https://cdn.shopify.com/s/files/1/0462/3132/2773/files/29852675041.pdf
    • https://static.usrfiles.com/ugd/b8c837_14528a42e0e348f6a6ba60112970bfb4.pdf
    • https://static.usrfiles.com/ugd/ed64d2_22bf1a45c5f74877a75c3c5c48c1bcac.pdf
    • https://static.usrfiles.com/ugd/b8c837_d57a875f48484ecb9c7ba2770793a251.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/29548810540.pdf
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/xabugenov.pdf
    • https://cdn.shopify.com/s/files/1/0445/2355/2927/files/200_opposite_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.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_off0000b5ca.bin
6e2ec75c2e439111dc826bf8f7c2a3b346be5747188f2384f2b6b09b4628c579		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CA 4960 bytes
font_01_sfnt_off0000c6ae.bin
1e27e838a5d9469ac986f26f3e5c93a61882152a9f30402b98975c1d7e4cd2eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AE 10500 bytes

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