Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d9009ca0b55ca0…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 05:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b525eb924d817ed8c4db48d17bfd19 SHA-1: 3674ceacb9276aa89137936de77c2ea82d3aa0d8 SHA-256: 04d9009ca0b55ca01f80ca3fd9219d94a37f2c6c1a59e565b5bcc1470e8b3502
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious infrastructure.

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=taking+boyfriend+applications+meme
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/97372049243.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/82542186869.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/docker_start_container_bash.pdf
    • https://static.usrfiles.com/ugd/0d2908_830258105f8a4a809a70e020ea01e516.pdf
    • https://static.usrfiles.com/ugd/d5415a_7b317215a69e463e8b2c8d4b80e5601d.pdf
    • https://static.usrfiles.com/ugd/8b49c6_59578eb81d8643babe4baa251dd4a29b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f825cf65625495496c79e78b526030c.pdf
    • https://static.usrfiles.com/ugd/c5d40f_7aff79e558d14e29b8f0976e93d0b781.pdf
    • https://static.usrfiles.com/ugd/63d3ad_fbe700cb00ab4cdd9d9229b18df46673.pdf
    • https://static.usrfiles.com/ugd/b8c837_c76a66380c9f4b50990411721f5d42fe.pdf
    • https://static.usrfiles.com/ugd/b48b60_c90470ab21854daea538aea75f17163f.pdf
    • https://static.usrfiles.com/ugd/599026_79b793ad79014c11a5f682aff40aaef2.pdf
    • https://static.usrfiles.com/ugd/7baf93_43d08f3d608546059021107fde7982f8.pdf
    • https://static.usrfiles.com/ugd/e1d12c_1908cec49a2542d490d0e59f6e3df040.pdf
    • https://static.usrfiles.com/ugd/353d00_b8be002e8cf14c02af36a8209e6b0d18.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_off00006768.bin
5186b3a2c375e9bcd63d89a6c054259b5086ef0008d5e688c239eb04c38e061a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 5728 bytes
font_01_sfnt_off00007ad8.bin
4c4ddb67f128e957e7f04a4f33c1cedab7ed983638ace361902c8dd86d1ecde2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 10416 bytes