Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db9cc989a87d974…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 08:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91b607baff5835f99276a7207335be58 SHA-1: 629393219632203ad5660463ee8537b295ffc2ee SHA-256: 4db9cc989a87d9742c13a2a0eaa3a4439e99e552df640c9ae23b4c7741e8a85a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Ptba financial report' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links points to a link farm strategy, likely for SEO poisoning or to host further malicious content.

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=ptba+financial+report
    • http://files.littlegoblingarments.com/uploads/1/3/0/7/130775647/vegerunanaxib_vasifok.pdf
    • http://fomesemen.eddiespaghettiart.com/uploads/1/3/0/7/130776088/398d87.pdf
    • http://files.bowenislandrecyclingdepot.com/uploads/1/3/0/8/130813973/5893222.pdf
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/kekuxojoper.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6502/files/2018_calendar_with_weeks_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/60148379050.pdf
    • https://cdn.shopify.com/s/files/1/0440/1646/8133/files/mikizizo.pdf
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/breadtalk_group_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/61495772007.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/migoxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/vorulujafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/wixerexigoreto.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_off00005e8c.bin
5bcaebf2019e6b801de4c8d80e0ba8d2d630fe1c3d6aa82a00abe0e427ac1387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 4972 bytes
font_01_sfnt_off00006f77.bin
2cd74ce8bfb31e81d0e85e02b7843fdf1b4b5617a10c9c95351931700663e755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 14156 bytes

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