Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c5b42c8a23c873…

MALICIOUS

PDF

39.9 KB Created: 2020-09-05 02:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43b31df8760db69646dbf34ce9c3fbf0 SHA-1: 9b286a0fc653d8d88f25b4c56284180494cd86ad SHA-256: d8c5b42c8a23c873333e45761216d8cc804bfaaa60f422b6cec0a6410b8eddd3
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. This link, 'https://ttraff.club/wix?keyword=actaea+racemosa+guide+de+l%2527+hom%25C3%25A9opathie', is presented within the document body, disguised as information related to homeopathy. The file also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the primary malicious destination. No scripts were extracted, and the document body itself is largely obfuscated binary data with the exception of the lure text and URLs.

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.club/wix?keyword=actaea+racemosa+guide+de+l%2527+hom%25C3%25A9opathie
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/33069841062.pdf
    • https://cdn.shopify.com/s/files/1/0429/8339/1395/files/18314945182.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/82386767658.pdf
    • https://cdn.shopify.com/s/files/1/0461/8236/7386/files/32824533427.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/66811387170.pdf
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/wusasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/wokazuwivadumudipadiror.pdf
    • https://cdn.shopify.com/s/files/1/0459/9735/9261/files/cch_nui_tp_thanh_mai.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/95983619389.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/kujogufaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/piwisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8442/3073/files/2d_character_design_tutorial.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_off00005cf8.bin
2644b6ef78c7d7f67babc0065b187f9d1d2189c49b9f3c41bae8a525012bfe05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF8 5652 bytes
font_01_sfnt_off00006fc8.bin
40c696bd2dc57cc37cf85df2e62a43a7d62f49494052023a110e8f5f531f6fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 10032 bytes

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