Malicious PDF — malware analysis report

Static analysis result for SHA-256 378c75f4c39f834b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 18:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67e428c38ff830b2b1faad84e277ae93 SHA-1: 33a22b72971a6d78db1dc39bf957e6e67d0cc5c0 SHA-256: 378c75f4c39f834b7b9d70b4aa4902dd0ec6416d0ec77df7a79e33c913c0dc9a
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 links to other PDF files hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious activity. One of these links, however, redirects to a known malicious domain (ttraff.cc), indicating a potential phishing or malware distribution attempt. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=homoth%25C3%25A9tie+3%25C3%25A8me+exercices
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/91698714909.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/strengths_and_weaknesses_of_utilitarianism.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3215/files/viwarujurasokorijuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29318048561.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/user_created_templates_confluence.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/mongodb_driver_java.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/bonolusigenoxejivifujun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/bookmark_chrome_android.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a48830810ed4c32a71d3450ff964d25.pdf
    • https://static.usrfiles.com/ugd/b8c837_b617370c43ad47229a90c2b3610463ac.pdf
    • https://static.usrfiles.com/ugd/0049ca_2a6dbe7873f340bd91fd5a12cdbd7c1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_79d62f8333df476db4b78d181843641c.pdf
    • https://static.usrfiles.com/ugd/451461_a752d82c6afe4e3a9923caf382e6b4f6.pdf
    • https://cdn.shopify.com/s/files/1/0440/3698/0886/files/75935505070.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/15381878133.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/ninomoxifibuvit.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/49396519477.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_off0000546d.bin
6323567a682daf57066ea6220c7b0a8f6dd175de3b3498ca011d376cefa026ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x546D 5272 bytes
font_01_sfnt_off0000659f.bin
aeac3cc4f7511c90c875f800885240e0f74d755c6a3bd054c575cc7dfb259dcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 14308 bytes