Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fbdab3c2cf3c6c…

MALICIOUS

PDF

47.4 KB Created: 2020-08-31 22:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a075eb9f6732e854f56c4c39dab7ba35 SHA-1: b73423c24b237965054e589b7ae9d0216f57ac2d SHA-256: 95fbdab3c2cf3c6c206fb7b447006106309b3fe60977355ecdaedeec9ca09f9e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as information about Metformin 850 mg tablets. The document also functions as a link farm, directing users to numerous other PDFs hosted on various domains, including cdn.shopify.com and static.usrfiles.com. The primary malicious URL is the most critical IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=metformin+850+mg+tab
    • https://static.usrfiles.com/ugd/b42fd6_41fb5b1c55a54579abba8b70a6edefe5.pdf
    • https://static.usrfiles.com/ugd/9757e7_f656444288ec425a94fc475bbd778d96.pdf
    • https://static.usrfiles.com/ugd/b8c837_810b0651ded14a6692ae7a369acc15a9.pdf
    • https://static.usrfiles.com/ugd/238140_f77351f8c1fc4e489a8fdb39d6b6cd13.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/rosusorudefigexum.pdf
    • https://cdn.shopify.com/s/files/1/0460/2272/1695/files/facebook_video_mobile_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/dawkins_god_alister_mcgrath.pdf
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/free_jeopardy_template_for_powerpoint.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1416/files/moninejofevijixosav.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb2c15093a80485a9d851f595bd3b2e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c7bc2589ff442eaeb0f013c4b53601.pdf
    • https://static.usrfiles.com/ugd/48d9a1_7a256a14374945d79320e36963a72645.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/63223320191.pdf
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/durutimevakagizojabawuvep.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/60460927162.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/cancer_de_pancreas_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2673/files/tubikadojuselojar.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_off00007bfc.bin
7aff99bf163c5f8e1537ae173bd67e0c79126edad74115234e093fc4065ede0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFC 5480 bytes
font_01_sfnt_off00008e99.bin
48430b1fcc9b419034b810c3a88c2ac02a2eed6322522236e3618b9875c0a20d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E99 10084 bytes

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