Malicious PDF — malware analysis report

Static analysis result for SHA-256 5790d08ea71bc5ea…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 09:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36097f9deeaffc3797d2147ab0d776a SHA-1: 3c3cd7eeae1a658414e887a2780018f37d4c8322 SHA-256: 5790d08ea71bc5eacb451ef2e21fb495b03a3af2ede3b8c63fff199625afb2d9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=pre+remington+marlin+guide+gun'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL and references to other PDFs, reinforcing the lure-based attack pattern.

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.me/wix?keyword=pre+remington+marlin+guide+gun
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/kipemajimapemipukamov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/12426359884.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/9429321823.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7660/files/rumisevexepas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/clinical_medical_administrative_assistant_training_manual_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/lujilefavokiwav.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/taquicardia_ventricular_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0461/9688/3614/files/dapijatamavuna.pdf
    • https://cdn.shopify.com/s/files/1/0432/5674/2046/files/36137495538.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/49668244488.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/60258764606.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/samalibuwajisuvakuzoxuku.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_off00005f1e.bin
0411e1f6ca0ae8977064e5336317f2f27fd599a092fc1ee19a9b34d633f02fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1E 4848 bytes
font_01_sfnt_off00006f69.bin
ee837b104581ec9a0a5509f69f1f7693065a325c174f0e6df54977ffa26ee780
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 10180 bytes
font_02_sfnt_off00009245.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9245 4324 bytes