Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48cd5c3596673d8…

MALICIOUS

PDF

43.6 KB Created: 2020-08-22 15:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 488fbf5202e72e932a0afaaebc603f24 SHA-1: 034c9fd36b3fd35b826c8c54fcca6b8fb5a68586 SHA-256: f48cd5c3596673d8044fa7025bd3b846bf64ecfd619d87ffa5688ca8c237b936
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link leading to a redirector known to host malicious content. The document body, though heavily obfuscated, contains text related to financial calculations and the malicious URL. This suggests a phishing attempt to redirect users to potentially harmful sites under the guise of a financial tool.

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.cc/pify?keyword=debt+ratio+calculator+balance+sheet
    • http://xafamo.stjohnsoakland.org/uploads/1/3/1/4/131407995/tofexenolivid-kuwujudiribasu.pdf
    • http://files.coloradoriverstories.org/uploads/1/3/1/3/131398507/4701041.pdf
    • http://files.finneranmuzzey.com/uploads/1/3/0/8/130874120/2830512.pdf
    • http://palos.gmfseminole.com/uploads/1/3/0/8/130813592/tusap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/bodolupoturozelomo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/fosevufuk.pdf
    • https://cdn.shopify.com/s/files/1/0447/3644/6613/files/reduce_file_size_adobe_reader_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2443/files/kiwado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/kasonafozerisutojobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2610/files/73696549199.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/wuzabegivegekupomuvafeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7368/files/classic_cougar_forum.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/biological_molecules_questions_and_answers.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_off00006c69.bin
92cc50242889fa123dcf0ae294a33a27b12b726f7cd71cfe980cd29cf6eacacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C69 5024 bytes
font_01_sfnt_off00007d70.bin
dce1ae8eeac34b903b2a143be03267b8149a05a6f37edc21c4f78bc1200b2390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 10676 bytes

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