Malicious PDF — malware analysis report

Static analysis result for SHA-256 a395a789ab8a851c…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 14:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7baa86439b76a40ff5ebf564560aee85 SHA-1: 66d6cee0bb16e27e8590b204ba0c41ecf296efc7 SHA-256: a395a789ab8a851cc7b93a459e368f49b40fde3c53385248ef033a2a56518f6f
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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a search query related to 'chromecast vpn workaround android', suggesting a lure to trick users into clicking the link. The file also contains a large number of embedded links, many of which point to Shopify domains, indicating a link farm strategy. The primary malicious IOC is the redirector URL.

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.com/wix?keyword=chromecast+vpn+workaround+android
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/61640607732.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/basexelatutedivago.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/wamikukawere.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/37433261994.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/watebewakupeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/jewidosewemupe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/42641559240.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/anandam_movie_in_kutty_movies.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/94189139307.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/ladogurar.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/saxarabifaxukorulo.pdf
    • https://static.usrfiles.com/ugd/47b1e8_eef9eaaab804463abb9d439d288277f8.pdf
    • https://static.usrfiles.com/ugd/9219f8_8898951b9b304b4b9f9a5df1a6d33bd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce4376c3d3a342f391a01856abd891d4.pdf
    • https://static.usrfiles.com/ugd/2274a7_dd85e9d86c594f6586055be471cbbc58.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_off00007e05.bin
9088bc5a4d93b0fafdf4f7aee5f6a7bff55ce70d384e16168abab306fc642d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E05 5404 bytes
font_01_sfnt_off00009046.bin
bf11c0e8b0288879ce8281e2980ea5b51d9ab9a112c9a6c455c8f7c895602d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9046 10268 bytes

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