Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea90216436b0d4…

MALICIOUS

PDF

60.0 KB Created: 2020-08-30 01:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 088edfdd499f744e6bc213cfb27f219c SHA-1: 423ac360342fc5efb4331d7d947250eb0a46d997 SHA-256: ceea90216436b0d401ae4dcea1778633f3dec67cf817e98922aa08dcff756ec3
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.com/wix?keyword=comparative+financial+statements+for', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to external 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=comparative+financial+statements+for
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/61085129368.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/bse_odisha_10th_class_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/93262194623.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/lasopibinakun.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/68836684497.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/64447410292.pdf
    • https://cdn.shopify.com/s/files/1/0434/4070/1606/files/63327945251.pdf
    • https://static.usrfiles.com/ugd/b8c837_cde69cece01944fc9a72117725dfb31a.pdf
    • https://static.usrfiles.com/ugd/b8c837_846b09febf96493084f20af08920a2be.pdf
    • https://static.usrfiles.com/ugd/b8c837_a70d14e4017c4f3e9b472845f8e7e8a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_682d915c828e49ccae42f5eabca10abc.pdf
    • https://static.usrfiles.com/ugd/93971e_f771af6acc5140f485501afbaad41700.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c34.bin
11b7f90f011ec18e70b4abdf2ee41c17a8a82e5a3a484a4ec87b96c7638a3836
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 11932 bytes
font_01_sfnt_off0000a2a9.bin
e460dd325ff8ae25a4440edbb69e9dd583f8b1dff3f1e953a494fe1d1a71ba3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A9 5128 bytes
font_02_sfnt_off0000b402.bin
eb24bfa820b4034ddf9e11da961e04d064c11b184667a66035a3625d0fb3450a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB402 14180 bytes