Malicious PDF — malware analysis report

Static analysis result for SHA-256 f229856b0ee719da…

MALICIOUS

PDF

33.0 KB Created: 2020-08-31 06:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc2f4d728308495d633b6afa6db9722 SHA-1: 19f2cc66b6ec584de598709003e53fbfb682dd49 SHA-256: f229856b0ee719da8e390056f965b7c6b3a181d9ba53863d4c0f3486e5c62dcd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, 'https://ttraff.com/wix?keyword=hardware+store+cherry+hill+nj', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and a list of other PDF links, suggesting a link farm or redirection scheme designed to lead users to malicious content.

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=hardware+store+cherry+hill+nj
    • https://static.usrfiles.com/ugd/b8c837_9a1e20dd27f2416ea1efae8364f4157a.pdf
    • https://static.usrfiles.com/ugd/0047a4_370bb1e38665433aa8e3b978ec5830e5.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_764ef0f615fc41e88ec4764a1af15e7b.pdf
    • https://cdn.shopify.com/s/files/1/0465/8806/8005/files/vidixajiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/jofozis.pdf
    • https://static.usrfiles.com/ugd/29c71c_c15a4ae76c6e46858d9a657be1cd1515.pdf
    • https://static.usrfiles.com/ugd/8b2c09_c214f0224b3f4ce79139fae3bb83c81d.pdf
    • https://static.usrfiles.com/ugd/db93e9_7eab6fd8a28440a580b4fd7dea79df6f.pdf
    • https://static.usrfiles.com/ugd/a298ce_40775cc03cb94ed6837e0cc99f7243aa.pdf
    • https://static.usrfiles.com/ugd/b47706_1d760fddb4c648f488216c1fffc96139.pdf
    • https://static.usrfiles.com/ugd/bfbc46_71f3bb1a05ca4ddabd31d0412b70dcfd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3c91d1cdd20489fab72408da3a639f5.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_e8c0c3167c2244a9808019a01de5312e.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_off000044aa.bin
c5ab1f9f097c2c7b0c35f1697ffc430d3cd3d88d78f2a2974fa27ca5922f45f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x44AA 5260 bytes
font_01_sfnt_off00005698.bin
a52fc790db4c697c140a8e6c47542e2e0ce2c4e946d43d6409fb3325243143d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5698 9628 bytes