Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5876270c90a25d…

MALICIOUS

PDF

37.8 KB Created: 2020-08-31 11:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eb0df28f0427a17323b2cef899ab32b SHA-1: 15f1a21bd6ffb92d60bb57fcc418e9c7c8018797 SHA-256: 1e5876270c90a25d5eb69c52501f78da3721d04f21a80e9fcb5a03c66bc453f1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=bhool+bhulaiyaa+2007+full+movie+down'. This URL is designed to lure users by appearing to offer a movie download. The document also contains a large number of embedded links, many of which point to 'static.usrfiles.com', suggesting a link farm or SEO poisoning tactic to increase visibility. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload or lead to a phishing page.

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=bhool+bhulaiyaa+2007+full+movie+down
    • https://static.usrfiles.com/ugd/b8c837_6109d0da593947988d5a3197125eb307.pdf
    • https://static.usrfiles.com/ugd/ab63e3_e61ebb3592bd416caf9cc3c9ecbd228e.pdf
    • https://static.usrfiles.com/ugd/ec0c41_b7c71e01f44e45faa1a65d5084276b58.pdf
    • https://static.usrfiles.com/ugd/7f16bd_3a3ad8049d224240a3b7ff12d05dbeeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/entrepreneurship_development_book_by_rajeev_roy.pdf
    • https://static.usrfiles.com/ugd/824332_c1cc9d8d4323475c8fdfb68dddcecb56.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd0c15b13944d3c8c0a7ccd19bb429c.pdf
    • https://static.usrfiles.com/ugd/1f2646_db0bccd3820046468de608097f864bf8.pdf
    • https://cdn.shopify.com/s/files/1/0440/1345/3470/files/12645904384.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/jikibopovopubuxa.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_off00005329.bin
3ab31ca50f65843cf73fa6377194be841aa99f51996b0cb675fd9f09e1f272ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5329 5668 bytes
font_01_sfnt_off00006684.bin
4de4092779117046484de4de1e23707704271c2d89bae2e5ab248c741277b06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 10708 bytes

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