Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbf4a83f475c11f…

MALICIOUS

PDF

49.4 KB Created: 2020-08-30 05:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 499ccf091e2b1d9436294a64fd932349 SHA-1: 5834411ed3d306a460c32cdaf6b3cf052330eb95 SHA-256: 7bbf4a83f475c11fdad9da28457a3c26cb6aa5d4ad9412d0a0eb86f4bd8f42a5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.me/wix?keyword=yoga+sutras+de+patanjali+em+portugues'. While many other links point to benign Shopify-hosted PDFs, the presence of the malicious redirector indicates a likely attempt to lure users to harmful content. No scripts were extracted, and the document body is heavily obfuscated.

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=yoga+sutras+de+patanjali+em+portugues
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/wulepirotax.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/fundamental_of_electrical_and_electronic_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/86336103529.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/jquery_long_polling.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/tg20_compliance_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc7a0b5618484dca89d0d83502fb0d85.pdf
    • https://static.usrfiles.com/ugd/b8c837_b321b21320a64d7cbcbbbf065576e80b.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/kivubor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/barse_song_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/6693765635.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/jesujapuvokogolazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/madedimekaturuzogap.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/7983972779.pdf
    • https://cdn.shopify.com/s/files/1/0437/4233/1034/files/73232676095.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/zilapapikaloxavivuwe.pdf
    • https://cdn.shopify.com/s/files/1/0439/7396/8030/files/86323214196.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_off00008279.bin
f191a0b3f1639383ec0cee814ef3fd40c3d0b0a88276e97e7ab8a31a3138a2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 5316 bytes
font_01_sfnt_off0000947e.bin
fb2a3154542bbdc12333b35aaa7eb816e73675adb197d657ae2f8c978d72bbb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x947E 10088 bytes

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