Malicious PDF — malware analysis report

Static analysis result for SHA-256 0baa0ddfcf0f2c1f…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 11:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2b64a7b8e73143b9814a01002922efd SHA-1: c5fe94ee457c32fd91b305a09585df4630230e51 SHA-256: 0baa0ddfcf0f2c1fadee8e299713efa64d191716bfa132ee76d26817513bc345
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'dbz crossover download' and the malicious URL, suggesting a lure for users to click the link. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO poisoning attempt to distribute 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=dbz+crossover+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/susizelogofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/kutolidavikegavawisoji.pdf
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/maxudokediza.pdf
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/best_free_textbook_sites.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e060fe67f1445b1a554ed6579778996.pdf
    • https://static.usrfiles.com/ugd/b8c837_21cb4e68ab704fa3b620b496ca41d391.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/35843474626.pdf
    • https://cdn.shopify.com/s/files/1/0460/2216/4639/files/85935531403.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4195/files/7_11_beyonce_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1460/2401/files/administering_a_sql_database_infrastructure_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/90195720240.pdf
    • https://cdn.shopify.com/s/files/1/0465/3193/6414/files/losuzerava.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e2a.bin
f9b8c4aecea9a9fbdbdbee8baee38860a71acf6a4c51f74cf6e5d4699a3b712c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2A 4936 bytes
font_01_sfnt_off00006f05.bin
c905866986032c93e643a9dd8be66e30b36fc82981352412b43844a328ddb90f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 9984 bytes
font_02_sfnt_off000090e1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E1 4324 bytes