Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dd1f1b42701537…

MALICIOUS

PDF

42.6 KB Created: 2020-08-27 19:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5457c7fd4c55e9e3bf778fb4d02e39c4 SHA-1: 925a524eed0c3b340d961c16a9fa1c6dfb07328c SHA-256: 75dd1f1b4270153775aae8f534cefd6c41b1f1d0aaa99090ef40949da2048349
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to 'Chirai dragon ball' and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier also 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.com/pify?keyword=chirai+dragon+ball
    • http://files.jhigh18.com/uploads/1/3/2/7/132741110/mamamofomoseniwowu.pdf
    • http://files.meganboylecellostudio.com/uploads/1/3/0/7/130739309/ronawugub_bavevojiwipete_gosajo_xalunixe.pdf
    • http://files.blrland.co.za/uploads/1/3/1/3/131398473/pujozixo.pdf
    • http://pobuke.katieshaw.co.uk/uploads/1/3/1/4/131437130/mojixodaxotabufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/bejerenolezakupokoxini.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/45610519794.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/53836370922.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/91018701680.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/componentes_organicos_e_inorganicos_de_la_saliva.pdf
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/free_trend_analysis_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/les_antonymes_des_mots.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc9.bin
47d31801b5a7bc0d352710c1146f84bb5715baffd36428acb47d690666272eb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 3008 bytes
font_01_sfnt_off00006882.bin
7f7b67f35c9e838bfe7028d13eed9089c29a690c88db79c21e9677593163b196
pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 4956 bytes
font_02_sfnt_off0000794c.bin
eed4359fc2ded7c8aa8a5308139c762d8b89019ec5c2f3fcf6b6d4c1b9acc4fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x794C 10256 bytes