Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7431d131cc771eb…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 07:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094702216e101b91d6e8f5ac365ec2ab SHA-1: 407f0612011c09ba2dd1dbb1fcdb73ad32b0fab2 SHA-256: e7431d131cc771eb31e9f45cb393207222b99b5f20270b0b33fe93b404003c37
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, disguised with a search query related to game downloads. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, suggesting a broader campaign to distribute malicious content. The presence of a visual download button lure further supports the deceptive nature of the document.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=warkeys+dota+download
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/51189386949.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/17769602286.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/xutufitosovomo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/chaos_engineering_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/kidozutitepebijaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/90098732620.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/sri_rudram_chamakam_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/bastien_piano_basics_level_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/febagufuwonamixotibesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/pedejimopajuralogefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/analytical_chemistry_by_g_d_christian_6th_edition.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_off00005f36.bin
70078b7447273747ac409b66a5b0fe17644abb8d925e7d4f05ee94b4398bd365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F36 5092 bytes
font_01_sfnt_off000070b5.bin
02c7d75e34d6a88a044ebb031fe1b940f365ea476324793dd8969a8e2e580e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B5 10192 bytes

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