Malicious PDF — malware analysis report

Static analysis result for SHA-256 45931983f3b32e35…

MALICIOUS

PDF

31.4 KB Created: 2020-08-12 05:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec7c849a427b438197b3b42b3252100 SHA-1: 930542b9fc5342820bdc8d393bcbcd54af750e7c SHA-256: 45931983f3b32e351ea39a9fa124aee49b32aaed082547505cf7d0afbb6140c3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a critical threat, and 'PDF_SEO_LINK_FARM' suggests a large number of external links, many pointing to benign Shopify domains but likely used for SEO manipulation. The primary malicious IOC is the ttraff.ru redirector URL, which is likely used to funnel users to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=industrial+wastewater+treatment+handbook+pdf
    • http://files.youngcalebcarrbowtie.com/uploads/1/3/2/3/132302780/lavupibemadiwi-dewap.pdf
    • http://files.authenticbathroomrenovators.com/uploads/1/3/1/4/131410158/xoxewixifoweto.pdf
    • http://files.mymorrowfamily.com/uploads/1/3/1/1/131164431/wazepobimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/teachers_lesson_attendance_register.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/xesofajogefowusezikeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zawitowawipujeko.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/xanalerisopepigadomamuvez.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/sosilukudonogejaduwijuka.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2646/files/reruri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25346701784.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/2090200773.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/12385488370.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_off000040ae.bin
91007034158c73c5fbd47dd6efcdbbccc29beac56dcaaa15ca0ab92614affddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40AE 5516 bytes
font_01_sfnt_off00005344.bin
c6e735cbb2a893e9a556e217652c3ce5304059f145ebfbd1bddd9d80b5e25885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 8660 bytes

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