Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2cace33f49f611…

MALICIOUS

PDF

37.5 KB Created: 2020-08-20 12:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ddedccaf2b4c646398e107a303e83c0 SHA-1: 0dfcbed696344d259be747d4dcb6eefeb4bd1372 SHA-256: 5b2cace33f49f611cfd77d27af714969d3f5f5e833cdab07a32cfe8dcd805387
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 at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'scratch tutorial video' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate a malicious intent to redirect users to harmful content.

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/pify?keyword=scratch+tutorial+video
    • http://dadaxero.kasrakaviani.com/uploads/1/3/2/6/132681556/raxepusajojavex-lubusukinu.pdf
    • http://files.islandsforever.com/uploads/1/3/1/4/131453499/vomufizobexasit_karipumutila_soxizadujenojug_vomozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/rozitofi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/era_paleozoica.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/retosajonusuvufirebowur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/chaos_theory_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/7813/0593/files/jupibofusobidogijiwug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/friends_never_say_goodbay.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/lirobojuvutizu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/el_camino_del_artista_completo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8058/9207/files/calculus_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/the_longman_writer.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/kalopoditakaku.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/64334489895.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005772.bin
e353d18df50a81b0674b591d73c0d19222d697d345cedcc97de29538766ccf07
pdf-font-stream PDF embedded font (sfnt) at offset 0x5772 5012 bytes
font_01_sfnt_off0000686e.bin
7d2659971bc7e8302a37f56d605a5ccf5caebd7a5102e92987597f56acc85026
pdf-font-stream PDF embedded font (sfnt) at offset 0x686E 9784 bytes