Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a428d6ad92b3c70…

MALICIOUS

PDF

56.9 KB Created: 2020-08-29 17:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa0065202ac757e8d87a4cd41858a44 SHA-1: fc6e3d833ce2d507a5db98b7c11a2d59c8837776 SHA-256: 3a428d6ad92b3c707595457103e19640d14ea3b60affa5d7b7a050b1dc3346e0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with 22 links pointing to external resources, a common tactic for SEO link farms. One of these links, 'https://ttraff.ru/wix?keyword=neil+postman+amusing+ourselves+to+de', is identified as a malicious redirector. The document body is heavily obfuscated but contains the same URL, suggesting it is the primary lure.

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/wix?keyword=neil+postman+amusing+ourselves+to+de
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/sullivan_algebra_and_trig_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/barron_s_essential_words_for_the_toeic.pdf
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/fekisipejivabofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7176/5656/files/que_es_la_neoliberalismo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/papudanetizowopud.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/6659000198.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/17977508911.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/among_us_pc_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/67555043654.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/69780957921.pdf
    • https://cdn.shopify.com/s/files/1/0461/2092/7396/files/paper_flower_leaves_template_free.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_off0000a212.bin
30e7b748e1e492ff2e2e3d871a65448f4567f69bb0eb46626e091a68f8bc2f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA212 5308 bytes
font_01_sfnt_off0000b406.bin
cd5d3ccecbf8d1ea655a3118ee37558d800a6dc96917849df8167579537d2a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB406 10076 bytes

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