Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f48214f9f08024…

MALICIOUS

PDF

39.6 KB Created: 2020-08-17 10:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d48036baa3c9724ee1d757eb836687c SHA-1: a4bf199b02cf90fa3e1db91f8a325ff970fd841c SHA-256: d8f48214f9f080240015f5d1e2f9179e8f4dbd6422df9fef960bee29cd2286ce
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=charcot+foot+deformity+images', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a link farm and a malicious redirector indicates an attempt to lure users to malicious sites.

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.ru/pify?keyword=charcot+foot+deformity+images
    • http://files.martykanova.com/uploads/1/3/0/7/130738836/7724436.pdf
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/financial_accounting_in_tally_erp_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/definition_of_authoritarianism.pdf
    • https://cdn.shopify.com/s/files/1/0428/3986/7559/files/natazezenumufujedapez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/89407056510.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4587/files/cambridge_grade_6_science_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/seek._co._nz_cv_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/42840399601.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_off00005d1a.bin
9b1ea3086bfa690030089bb74173d4c09891f1276b976a336916f680585ac4d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1A 5408 bytes
font_01_sfnt_off00006f6a.bin
b058493f5218153f98ef72a2dbd2627ceac39532156fbf112dd172049d0cf4f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6A 10068 bytes

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