Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c187a586919dc6c…

MALICIOUS

PDF

37.1 KB Created: 2020-08-21 15:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5733378124377a0970c3dd2acbd763d1 SHA-1: 1b8f71d07582e31da113a5d72fe1777dbd9e271b SHA-256: 9c187a586919dc6c535a7b84822d3a859cc83ae23b7a825b030f03c32a9ce483
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a PDF link farm. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=bhakti+photo+free++hd', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting it's the intended lure. The presence of numerous Shopify links, while some are confirmed benign, contributes to the overall SEO spamming nature of the 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.ru/pify?keyword=bhakti+photo+free++hd
    • http://bezini.jfrancoist-shirtsdesigns.com/uploads/1/3/0/8/130813780/forom.pdf
    • http://files.hannahsclassroom.com/uploads/1/3/2/3/132303238/wojazogofuguwozoge.pdf
    • http://files.ekilmp.com/uploads/1/3/0/9/130969561/915102.pdf
    • http://nulebixig.eugeneholisticmedicine.com/uploads/1/3/1/4/131438556/1f57170cbece.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/wewowejimaviregiravefinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3840/files/landscaping_invoice_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/78495616632.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/wenulujegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/mitikonekupaxojizuroduxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/kobomizig.pdf
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/aspen_hysys_tutorials_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/40238613337.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/business_environment_components.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/zafig.pdf
    • https://cdn.shopify.com/s/files/1/0439/2573/3531/files/dipuwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/zagegolufiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/51924608045.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_off00005416.bin
9775ba90e1dcc3f918b02b48b2a4cbade5e650c90e6cd56d2903dc18f6d9b321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5416 5032 bytes
font_01_sfnt_off0000652c.bin
a63d8e30e0033d6b199cbc2082000af681e5280171703561c8d8bcbb163d0265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 10092 bytes

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