Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8681db5d7f4be02…

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 17:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd0a931cd09410d6d6883cc2edcb6b1 SHA-1: ee1ceb95fdd5cefc7fb9d65654bbf29a4bc5f9c3 SHA-256: c8681db5d7f4be02620466c5287a3e1fba740dc1772dad64a4b12929e0ec3fea
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Mergers acquisitions and corporate restructurings' and includes the malicious URL. This suggests the PDF is designed to trick users into visiting a malicious site by appearing to offer a relevant document.

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=mergers+acquisitions+and+corporate+restructurings+wiley+corporate+f+a+pdf
    • http://files.bleedingheartsbotanicals.com/uploads/1/3/0/8/130874575/fotogerujujerez.pdf
    • http://files.kellyhosts.com/uploads/1/3/0/9/130968996/guwokimejuk.pdf
    • http://files.joshraftery.com/uploads/1/3/1/4/131453432/mizib.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/wokaxinifuzufeviguxofuzig.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/13030587109.pdf
    • https://cdn.shopify.com/s/files/1/0429/0081/6028/files/fly_tying_knots.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/1947_dodge_truck_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/gafironalagesogaxatixufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/80411353357.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/barney_i_love_you_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/zorapeboboma.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/semajudilufupugapukeniro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/20748067221.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/5250206816.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/likuvewi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/32883167301.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_off000054d7.bin
ee2b96dfb619215073aabda993459679f4aaf945363e2688210b8aed3df33472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D7 5648 bytes
font_01_sfnt_off0000683f.bin
ca35e994974544208d9cd1a6bd2887746ecb40252dca97c8ed7a5031285b00aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 10288 bytes

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