Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d3cd8348b03bff…

MALICIOUS

PDF

48.6 KB Created: 2020-08-29 03:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea473bc0e25c035b3d3dd522c87b50df SHA-1: 66e6fb945792d15e60507a9fbe6684579c17e455 SHA-256: 39d3cd8348b03bff2f1a1602366cac530e456a5d98cc9a9839bbbc6550d3e54b
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The embedded URL 'https://ttraff.cc/wix?keyword=greater+blight+drone+rules' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=greater+blight+drone+rules
    • https://static.usrfiles.com/ugd/b8c837_f8437bfbc26b424c91f8d9ba040621c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d398b0f79434bf4ac344646bc9b8364.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a0c8d55a448421a8388470bbb5c2218.pdf
    • https://static.usrfiles.com/ugd/b8c837_68d82d63751d4673a654b89ed94a7141.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e04b37cf8234c69b4a55d7882f1f717.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c30d21a8b8c4586b5e78b68638c2b08.pdf
    • https://static.usrfiles.com/ugd/b8c837_eca20d8d80864686b7b0ff98c33d8a2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fe17330b13644db9c3e8dd8bee514fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c07c7ce790074a16ad2c28d80dfd1545.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/avol_tv_website.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/makalah_obat_anti_jamur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3737/6157/files/66998523088.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_off000080c4.bin
5cd2d1e34b2c2bb2027d2193f43c623f51e31a690e62c3e0279f347a9db6e6bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C4 5260 bytes
font_01_sfnt_off00009290.bin
6c43805e7098c48c968e59de6de76fa1aa63c246716933614cf7fbdea7e1443c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 10268 bytes