Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ea9b8b25c8720d…

MALICIOUS

PDF

38.1 KB Created: 2020-08-30 00:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dffd6744640fd230ae9f0a83bb448c34 SHA-1: 8bb2e88c796c8d8428b31b5ae23871383ccf93b9 SHA-256: 68ea9b8b25c8720d2ba748cd1cbc192cd4a2389547b8a90039eb65d3db7c280c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'passive voice' and a URL, suggesting a lure to external content. The presence of a link farm heuristic further indicates an attempt to drive traffic to potentially malicious sites.

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/wix?keyword=passive+voice+all+tenses+chart+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/538d67_3d286cb0d97949e7af0db53ccb863c12.pdf
    • https://static.usrfiles.com/ugd/dd4472_1b8bd657e2ba434f9978bc20d7132c14.pdf
    • https://static.usrfiles.com/ugd/07ef24_576649b977f04b12a0a86b0bbedc3bb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e268caaef2da41fcadac0c154334b4f2.pdf
    • https://static.usrfiles.com/ugd/d5d855_bbd7c80b0502463088e1d99ad55b2b8f.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/93602442072.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/australian_animals_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/92449569463.pdf
    • https://static.usrfiles.com/ugd/67e251_996ff3aefb1f4e9790b4cd9978e7f92a.pdf
    • https://static.usrfiles.com/ugd/6f7357_b03bc2925a25405ca00e60eaffb778af.pdf
    • https://static.usrfiles.com/ugd/b11f6d_00cc87a7d6634a0c9326a0e0db99080d.pdf
    • https://static.usrfiles.com/ugd/0a0016_cec25af157e34f229482596722e94068.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_9b7cf80adf3542ceb289bd6150d77c37.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058eb.bin
5526db4c8e930d9b9de96ae414cf135d5ef6f0e81e5caee1a4d1aea25f42ebe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x58EB 5304 bytes
font_01_sfnt_off00006aec.bin
04f3f5c9b5a2b529a2f3be2180e69102b36cee2fdfa1e4713e450fb79d9a730c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 9568 bytes