Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3589ae2e5ae665c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 23:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bce06d22d0f40f88d47599610a94d2b SHA-1: cd3963e5e076307c23ee2f17e80422f4ce09ebcf SHA-256: b3589ae2e5ae665c3a527bf3e408ef4d34860b9563e80641af742e59ec827789
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 10 external links, including a redirector to a malicious URL. The primary malicious URL identified is https://ttraff.cc/pify?keyword=understanding+by+design+pdf++free. The document body, though heavily obfuscated, contains references to the same malicious URL and several benign-looking PDF links hosted on Shopify. The ML classifier strongly indicated maliciousness.

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/pify?keyword=understanding+by+design+pdf++free
    • http://files.nwbars.com/uploads/1/3/0/7/130776326/75476dffe8.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/maruguzuvuwilusalinidovub.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/buximijijutewazamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/the_haunting_of_hill_house_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/complete_bible_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3997/1736/files/lujadene.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0433/4108/6888/files/suzijebotesebop.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/78690877106.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/bill_nye_biodiversity_answers.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_off00006116.bin
0e72948ce3ae553e9d3d9c7451e1807b92b6a194e7e50ebf0964e335ab96be43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6116 5408 bytes
font_01_sfnt_off00007384.bin
aa9dc40a6d8ee10e45c7552d1d692494ddf18ccc308af5028c7de7e81b443008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7384 10240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.