Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0af9642558470f…

MALICIOUS

PDF

34.0 KB Created: 2020-08-30 04:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ccb2465deb87e039fa72637bb836c7 SHA-1: 56743eba04488c3e1c455d3cfd276e00ae6b8bf4 SHA-256: 8c0af9642558470fcf003e696c4095cfb5f2e36ec858c5e7059aa47c35fe2fe1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, a behavior flagged as a PDF SEO Link Farm. One of these links, specifically to 'ttraff.ru', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to direct users to malicious infrastructure under the guise of providing a business English PDF.

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=market+leader+business+english+intermediate+pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/4167115301.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/kokoselufuweditutedekube.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/zusammengesetzte_buchungsstze_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/tapokanajegakonifaporag.pdf
    • https://cdn.shopify.com/s/files/1/0429/5245/8396/files/zulajovog.pdf
    • https://static.usrfiles.com/ugd/f46427_93d936cff0cb4a4eb1864c54fd2be94a.pdf
    • https://static.usrfiles.com/ugd/9e53d4_65c388e780874f5bb48704fa14c16b11.pdf
    • https://cdn.shopify.com/s/files/1/0432/1712/5544/files/ocarina_of_time_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0103/files/37450877928.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/zaxugigudowirovuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/kipivovozagegedu.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_off0000463f.bin
8ebafae899266a5adf2625aad20a03cb7fb0ecf6416f2f61b6de8615d9bdcfe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x463F 5664 bytes
font_01_sfnt_off00005959.bin
e0d4f23ea36813853f37b2c8ad2969df8e5be15888a537495d846193fa3cd3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5959 9936 bytes

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