Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d9e3ee27f000ed…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 14:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e373a79d73aa46a30bd9290460ea91e6 SHA-1: b9eeb30dc040de0a5d6ecf5343089c6b3e7f97c9 SHA-256: c0d9e3ee27f000edf6d602a57b921dee6535bb76500e03a420f74dc29bb9cd28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. This suggests the PDF is part of a link farm designed to drive traffic to malicious sites, likely for phishing or malware delivery.

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=small%20group%20discussion%20method%20pdf
    • http://tipixo.carolynbjohnsonphotography.com/uploads/1/3/1/0/131071243/37bb06a8f90a2.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/ambiente_de_trabalho_do_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0435/6364/7131/files/roruxuwinelava.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/mejoxobafalotisake.pdf
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/61426844912.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/85591378735.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/bank_of_america_history.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/xovebekusan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/kusikaluni.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/21286880276.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/breville_juice_fountain_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/zaludixosexifil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/16633964992.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/nanuvetuloxe.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_off00005d38.bin
43dd536101e9b5b21b19c01fa36f4675a7dec7feee794eda7095324623ec023b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D38 5672 bytes
font_01_sfnt_off00007049.bin
1c7ad6c004967392cd885098b61e89de65a02299c2dd6826a9478f4e145d987f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7049 10908 bytes