Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24265a37fa2ab9a…

MALICIOUS

PDF

37.1 KB Created: 2020-08-14 19:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84fea8ab020b37051f24edf109d5b363 SHA-1: 2d36476070cdf09ebc4f1f42a428f2579b761dec SHA-256: a24265a37fa2ab9a4d52bd659dbbd6e8aeb833bfc52c270210889e61c70c233a
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.ru'. This URL is presented within the document body, disguised as a link to a commentary on earnings management. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to mask the malicious redirector. No scripts were extracted from this sample.

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/wb?keyword=commentary%20on%20earnings%20management%20pdf
    • http://dopudojo.cbcmtg.org/uploads/1/3/1/3/131380065/64f47c43d.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/donation_thank_you_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/87986622263.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/ximafonufekawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/puluvogab.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/chain_supply_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/ielts_writing_task_1_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/numavikipelekozopafogefu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/xixazudomidaxiramewik.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/84729216549.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/rupuwotijigebifexas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/xezukikekusesajetaxu.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_off000052b6.bin
0b02b3622778c91d54cbd5e0eb869e8fb778d91eabe777816a3aa1bbb0676759		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B6 5336 bytes
font_01_sfnt_off000064cd.bin
c0c1324c410c8bbc2ddfd502a00e751c5ad4f50feb37aa3d59a2d3e09dbe9906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 10144 bytes

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