Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0bfda945299f0c…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 22:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cb7bff11bff6c20028c8192c6d0a81f SHA-1: f7c7a5feb3b57b1fbe43e5b732680a2ea2a5a3a2 SHA-256: eb0bfda945299f0c839874ec8aeceb3987ab69d5a2ac322de0bf937bade893ac
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and numerous other links hosted on Shopify, suggesting a link farm designed to lead users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=adriana+arydes+jardim+secreto
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/pantheon_form_function_content_context.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/ximimoripuvawadojarulolex.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/the_history_of_computer_science.pdf
    • https://static.usrfiles.com/ugd/dd4472_6970e5beea70446a993b1ff3a889c638.pdf
    • https://static.usrfiles.com/ugd/b8c837_362ce055998348668a5072dc3eb203d9.pdf
    • https://static.usrfiles.com/ugd/e3c460_aa6ae89e298c4c1c83e1c5a8bc4c2ccd.pdf
    • https://static.usrfiles.com/ugd/b8c837_170eb46b2c7d4203b9e2387ea5b0f15c.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/99796971711.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/gomebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/56648942832.pdf
    • https://static.usrfiles.com/ugd/105a8c_b0672619f81b4253b74535b3e55f70f5.pdf
    • https://static.usrfiles.com/ugd/ef253e_30497de3bb8c4d0895cf5939527f4e2e.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_off00005d25.bin
d73a869afacd4d208faa874a89e8bf62fbc6e7f4be3657bd108b9b96c799cc90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 5220 bytes
font_01_sfnt_off00006edd.bin
ef32194d3033db5f625c0c829e99689bb38caae98a7b8a5856c1ed1f95bac6fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDD 10164 bytes