Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ec12e057565c79…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 20:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 422f823aac29f5f951907c8b3a92d45f SHA-1: 0b260e56e507050d5215d5083434aa4238464fab SHA-256: 09ec12e057565c797b6a763c8eb2c7e861a8b213f161bd134a682d434a444845
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

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=professional+development+plan+template+excel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26225030347.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/marketing_whitebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/94902688390.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/35255020194.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/install_scikit_learn.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/60943705543.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/catabolism_vs_anabolism.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/96279138873.pdf
    • https://static.usrfiles.com/ugd/71fd01_9fac98313d8a4bd9ab9e1da2cbd1c54e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e20110fd41f4636b6ca4aa6395a8683.pdf
    • https://static.usrfiles.com/ugd/d4da64_13263f701c2c48e7935e9e2d84d729cf.pdf
    • https://static.usrfiles.com/ugd/857e61_faf3fae1bf2643ab9c610986b3bd6b6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d9a5dc6c114c009b489c546dfeb623.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d9617a8c86423a9f1b3d48f3c18a84.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_off000080fc.bin
18b85d49cf2ec93bfa38db9d9d2d7e3b1852252315ac42bbc4f85a0e79721aee
pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 5428 bytes
font_01_sfnt_off00009361.bin
43270a661598cd9728218714fbd0c9d3fc96e97a8bdc2beb6228c2815fd3c1a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9361 10120 bytes