Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea782aaa4578e352…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 23:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7914f056e28d430bac2c97376db1d026 SHA-1: f1c931528012dd7b9d4535f77bb3f9a4c7c7e05a SHA-256: ea782aaa4578e352f9d3abbbd8c731c41e1ceb660efda3058c70673230c4867d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, with one heuristic specifically identifying it as a "PDF_SEO_LINK_FARM". Another heuristic flags a direct link to a known malicious redirector, "https://ttraff.cc/pify?keyword=caveat+petition+format+pdf". The document body, though heavily obfuscated, contains this same URL and a title suggesting a lure related to legal documents. The primary attack pattern involves redirecting users to malicious infrastructure through a link farm.

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=caveat+petition+format+pdf
    • http://files.obryantdesignscapesllc.com/uploads/1/3/1/1/131164520/fubudotedejoxemixod.pdf
    • http://rekalubid.molarcubed.com/uploads/1/3/0/8/130874598/xidurakug-galumaxi.pdf
    • http://xazopox.mrspolay.com/uploads/1/3/1/4/131408027/9784571.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/85048798129.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/95113897877.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/migikunosojumosolituleki.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/recurrent_calcium_oxalate_stone_formation.pdf
    • https://cdn.shopify.com/s/files/1/0435/0899/0116/files/byomkesh_bakshi_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/wokejalojizujavebitupez.pdf
    • https://cdn.shopify.com/s/files/1/0458/5996/3033/files/stardew_valley_android_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/68593575046.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/56024862649.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/26690185732.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_off0000761e.bin
085ff7279e9763bbe725b27542d2e0a88ec97499bd6babc46958bb2fe0d27400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761E 4944 bytes
font_01_sfnt_off000086db.bin
52af07e49ead2b7edb5aa2990bd61eab6f7f4920c41934c19c75940500b67a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 9992 bytes

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