Malicious PDF — malware analysis report

Static analysis result for SHA-256 caca9234a41bc4d3…

MALICIOUS

PDF

44.8 KB Created: 2020-07-25 15:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 830679c2de9fea53cdf6254c097c51f7 SHA-1: c9b5133b9160ed56741e4a4adce47be1e47581c8 SHA-256: caca9234a41bc4d34a1347c8c43035bbb50d79addd3a35868d856162d5b89480
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to uninstallation, likely a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content distribution network used to host malicious or redirecting content.

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.com/pify?keyword=uninstall+android+studio+ubuntu+18
    • http://files.kindactswarmhearts.com/uploads/1/3/0/7/130775997/4774485.pdf
    • http://files.actrunning.com/uploads/1/3/0/8/130873708/gorima.pdf
    • http://files.coburghighhistorical.org/uploads/1/3/0/9/130968984/runadigi-ruworekopurav-mazesaxe-birerukulebim.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/wojeruvetosute.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/30826095988.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/27545062337.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/12292269271.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/36104203808.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/relefubovozefozuwawog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36103472339.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/bedifu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/gukivajedexituna.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nipexaledova.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/84

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007208.bin
5d0a9229e5934e5722d02dd729928a94a74dd12bdff872a719762a0f2462b2c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 4960 bytes
font_01_sfnt_off000082dd.bin
23cab7beb495b0b795b8d3cd4b98d247362c5d40e9e97345585f262ac6796274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 10392 bytes

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