Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6ad66f8984b096…

MALICIOUS

PDF

36.2 KB Created: 2020-08-21 13:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8228bfd448a01ccb957e8cf9ea171c SHA-1: e27acde7ab144fb9e2c560880bca3000e7d52a15 SHA-256: cb6ad66f8984b096c644141a8aaacb1748c8082d3cabca7d44ac3b56e969f577
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, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to trick users into clicking through to malicious content, likely for phishing or malware distribution.

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=cbr1000rr+2015+manual
    • http://xewobuwu.christianfitnesstv.com/uploads/1/3/0/8/130814328/zumatanunajo-rasolurop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/ligifozada.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/lewagugogafejet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/6565874675.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/basic_accounting_journal_entries_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/fufuzopetu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/julojuvoripabidazoziza.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/suluzexuzab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/command_prompt_codes_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0435/5604/4951/files/90963525165.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/luxeruwiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/28033905830.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_off00004891.bin
b5f2b2d87c8d72f71bd06dee16d7bd1b7014fb72b924157cb70f131ee929dfa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4891 5148 bytes
font_01_sfnt_off000059fc.bin
977220db141142f6730858cfa6f7ccccba13d8947adaceefb5f56743e0ad5a76
pdf-font-stream PDF embedded font (sfnt) at offset 0x59FC 13772 bytes