Malicious PDF — malware analysis report

Static analysis result for SHA-256 420a58e00d0a46c4…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 00:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b578857bc58b6700c4bf2994ba77e6 SHA-1: 6be648c1e2358dc63673aabeb410b0ba4ab5f937 SHA-256: 420a58e00d0a46c44acb624200195d3889f1af7228d77616ade253c2a663754b
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=olsztyn%20plan%20miasta%20pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com and other domains, suggesting a link farm designed to distribute malicious payloads or redirect users to phishing 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.cc/wb?keyword=olsztyn%20plan%20miasta%20pdf
    • http://files.npiam.org/uploads/1/3/1/0/131070526/ravafeli_kuxokozuw_pumalomofemef.pdf
    • http://files.palanihills.net/uploads/1/3/1/4/131437813/bokowew-jawalajop-bogutebejojib-vopum.pdf
    • http://files.blackgypsymamawagon.net/uploads/1/3/2/6/132695455/1390324.pdf
    • http://files.hrhgwenyfar.com/uploads/1/3/0/9/130969862/1d27675e339254.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/kusikives.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/allah_loves_me_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/pamadurijur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/argonautas_do_pacfico_ocidental_completo.pdf
    • https://cdn.shopify.com/s/files/1/0454/5226/3582/files/pdfmake_angularjs_html.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/cover_page_template_for_report_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7295/4269/files/63901382976.pdf
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/26117001435.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/33568800120.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_off00005983.bin
b68b361ddbbe98899109b9240f5cf343376f4244e50b35c61333858af56597db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5983 5268 bytes
font_01_sfnt_off00006b69.bin
18ea540bd65fafe99175dbb4064d474dfa24499bd435ab9f1efd70ebf53b2b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 11428 bytes

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