Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7b9ac12ca82d88…

MALICIOUS

PDF

47.4 KB Created: 2020-08-20 13:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f28585014630a053335b44986e7b105 SHA-1: 0f477757de85d59f9836a80369849ddaa51fbec0 SHA-256: 8b7b9ac12ca82d8844b5645f23fa81d143e0cf440e5c82a5cb64be2ea9471f59
150 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 'ttraff.ru'. Additionally, it exhibits a PDF link farm behavior, embedding numerous links to other PDFs, likely for SEO manipulation or to obscure malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs.

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.ru/pify?keyword=corded+phones+with+answering+machine+reviews
    • http://files.angelajullings.com/uploads/1/3/0/7/130775588/simobotupugewozelun.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/74499535628.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/costco_membership_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/god_of_war_betrayal.pdf
    • https://cdn.shopify.com/s/files/1/0452/8229/5969/files/book_of_mormon_stories_lds.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0065/files/58695991087.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/rugilifavijitiwiwoju.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/ashirwad_mantra_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/1773617941.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/87963561392.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7047/files/97342270114.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/40971960364.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/29842860726.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_off00007af0.bin
01c23e38160b98f3da75bfa2466f85cf3ec43100b3eba5e5593d6e520fcd5d41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF0 5512 bytes
font_01_sfnt_off00008da1.bin
40d075631d26a6af82afe4319096341a1b7b19c6f4aaddc68de53727682b78a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA1 10332 bytes

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