Malicious PDF — malware analysis report

Static analysis result for SHA-256 b500629cfdf15b80…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 21:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58d17cb7b1321d5d9297aa3aa28fa39 SHA-1: f562b914c65cb96e71d41e9e4f9c26369c6ae690 SHA-256: b500629cfdf15b80486c4beddb71c50e8ade3dbf469dd887c7ffcd1a83740b02
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates that a link within the document redirects to known malicious infrastructure at 'ttraff.ru'. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click on these links, which likely leads to further malicious content or exploits.

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.ru/wb?keyword=santa%20catalina%20de%20siena%20obras%20pdf
    • http://files.lakewinolafire.com/uploads/1/3/1/4/131437379/8896505.pdf
    • http://neveje.sportsmanstandardpoodles.com/uploads/1/3/1/0/131070450/vifuxaf-movabesopam.pdf
    • http://files.robirie.com/uploads/1/3/1/4/131410007/4828545.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1448/files/vevusikibotaniwenebela.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/vomiladimifoburon.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/a_decima_profecia_celestina.pdf
    • https://cdn.shopify.com/s/files/1/0436/5913/3081/files/79126348245.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/pdf_to_word_download_program.pdf
    • https://cdn.shopify.com/s/files/1/0436/5585/6281/files/convert_to_word_acrobat_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/99952512078.pdf
    • https://cdn.shopify.com/s/files/1/0435/5194/8963/files/43197848450.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/46638712602.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/jexojofopifiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/robutuwalivinu.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_off00007218.bin
495212278a447a54bc26c31b3db17d400be4ddd28fcb7942dafbe6e3319fe075
pdf-font-stream PDF embedded font (sfnt) at offset 0x7218 5392 bytes
font_01_sfnt_off00008464.bin
76a41fda64d6affc05d4781c886ed5629a2f205946f92fc187d6d2a86e20cdb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8464 10784 bytes