Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e3c1ec1f153b79…

MALICIOUS

PDF

45.4 KB Created: 2020-08-17 03:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c57cda93b9da2cd72fda4b4293b60f2 SHA-1: 6b73b8511869c9c14ace518b3624913471cc1447 SHA-256: 23e3c1ec1f153b79ae40d1442f4853709eea545c1a873a1830d95110cb3e2ff0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One of the primary links directs to a known malicious redirector at 'ttraff.ru'. This suggests a social engineering attack designed to lead users to malicious content through a chain of redirects. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=waste+it+on+me+karaoke
    • http://zedad.mihunlimited.com/uploads/1/3/1/6/131606407/luxozoriralo-sitavi-bomexamisidene-nelovizanufa.pdf
    • http://mojagiv.lifefirstskills.com/uploads/1/3/1/8/131857631/lowibegetaponaneguki.pdf
    • http://files.yichaorui.com/uploads/1/3/2/8/132815388/wejode_sijodud_segasumopamuwa.pdf
    • http://files.lambdalambdasigma.org/uploads/1/3/0/8/130813732/d287331d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/8330459622.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/filma_indian_me_titra_shqip.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/90306431038.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/poditaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1698/6534/files/the_outer_limits_season_2_episode_17.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/4646559057.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/zemukisopamaka.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/rizotanumirudurosuwir.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/61343113388.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/bixisulojitamodoraveli.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/polisodinu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/xatolixo.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_off00006893.bin
f08c07de9c162874cce21e6fa4fa506c922c49acc75d507cbbaa941d182446b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6893 4664 bytes
font_01_sfnt_off0000784c.bin
da942e2b880c7d7ab02611e5417115ab5be8bc50029339f49e08fbfa8d1732e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 10012 bytes
font_02_sfnt_off00009a9d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9D 4324 bytes