Malicious PDF — malware analysis report

Static analysis result for SHA-256 23339ce7e61ddabd…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 01:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 191426ea82bb2566c492b49a526dbba0 SHA-1: ffb4828b5240efcce794c584f32cb1b44d796537 SHA-256: 23339ce7e61ddabdbe7c1063539e042c1253960d66eb61ad67eecc45e8a24772
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document also contains a large number of embedded links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a phishing or social engineering attack.

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.com/wix?keyword=hali%25C3%25A7teki+simonlar+oku
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/54430079539.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/lumeza.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/fisico_quimica_castellan_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/raderaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/rubolupojizozasazorofaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0647/files/44082307373.pdf
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/tufagedovidupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/53536361745.pdf
    • https://static.usrfiles.com/ugd/b8c837_38511c11674340fa94f471187ca1020b.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f7b12aec2a4cd1b38058a6166f8b24.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/25232260037.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/27074165571.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_off0000617e.bin
5f1dc6e059c93429bf1697b2347e8fa4b66231efce9735478dd84829ed5627e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x617E 4920 bytes
font_01_sfnt_off00007212.bin
a7a1610f03c6bebbe5350ad39872cc0f48cd2486559d0f9001bec2b45c35811a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 11816 bytes
font_02_sfnt_off000096e5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 4324 bytes