Malicious PDF — malware analysis report

Static analysis result for SHA-256 33922ee3772e80bb…

MALICIOUS

PDF

51.1 KB Created: 2020-08-25 15:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6ea1ab95466add7d20f7751deaafac SHA-1: b2ee0fdfdf912b33d1951653c8ecfa2d834e4c3d SHA-256: 33922ee3772e80bb013ab6ec6610642204946b423b1cdb5bfd4c9ed4a638dde1
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=dinakaran+tamil+news+paper+pdf'. Another critical heuristic identified a PDF link farm, suggesting the document is part of an SEO spam campaign. The presence of multiple shopify.com links and one suspicious link from 'kowuri.baan-amorn.com' further supports this. The document body contains garbled text but includes the suspicious URL.

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=dinakaran+tamil+news+paper+pdf
    • http://kowuri.baan-amorn.com/uploads/1/3/0/8/130814526/tevobikigewiwemanag.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/1038373946.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/13590852578.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/business_case_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/61694574947.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/wusovelabixokuvode.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/80623868724.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/raxogijukim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/48058718303.pdf
    • https://cdn.shopify.com/s/files/1/0437/1870/5306/files/9924276070.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/building_construction_download.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_off00007d19.bin
de3e2d2407be7f5fe8ddf29cdf439f3c59adbcc348f39f168f17f566f1f97208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D19 5344 bytes
font_01_sfnt_off00008f43.bin
1299f627f1c380efb12127671e8f108f4c1469688f1f753bea30dbfc4b37c30e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F43 15936 bytes

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