Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0e180136b37fa0…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 01:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f53784065f4d451c3882ff18cc95a09 SHA-1: ca0b0f05e7fc800e212b7686ed10e6154a822552 SHA-256: cf0e180136b37fa09ae97c2133ae31c77fea8ac10a950f19c3dcb015ee7a943e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=termodinamik+kanunlar%25C4%25B1+nelerdir'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs. The ML classifier strongly flagged this PDF as malicious. The document body contains the malicious URL and other benign-looking PDF links, suggesting a lure to a malicious site.

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.cc/wix?keyword=termodinamik+kanunlar%25C4%25B1+nelerdir
    • https://static.usrfiles.com/ugd/77941b_3e9380e34a194a5bb034d90b809cfba0.pdf
    • https://static.usrfiles.com/ugd/b8c837_09eb44ff6261448a9168e17322fdcf36.pdf
    • https://static.usrfiles.com/ugd/b8c837_efc115f8b6fc463bb76a6b95ef7dabdc.pdf
    • https://static.usrfiles.com/ugd/e5a943_a1142d447a1f41ebbf9ab09bd9d84142.pdf
    • https://static.usrfiles.com/ugd/87a178_95d99872aec2433b984011e62b2e7f50.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/joputokorufojuwam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/stock_investment_analysis_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/32053681846.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4585/files/librecambismo_y_proteccionismo.pdf
    • https://static.usrfiles.com/ugd/289c5e_ffd92b729b8944e8a7ffb4738da065a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b917008ad8f4dde98ca2745c40b2371.pdf
    • https://static.usrfiles.com/ugd/2b3f46_bb5560cb5e174f4db5b039fe3a657a18.pdf
    • https://static.usrfiles.com/ugd/4b68be_9218af10a63e433aa116e9cc2dde9b29.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_off00006c04.bin
ba40c04c7502ecb9d4dbbc12e42efe140e1e03ab69b192f1bf500697eccb0993
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 4836 bytes
font_01_sfnt_off00007c5c.bin
11f43fb33b71b39a34495dbc7261795e790f40b38c201711e6d996a6b0037e1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 12452 bytes