Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1c708fb972c2e5…

MALICIOUS

PDF

37.8 KB Created: 2020-08-11 18:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45efca1df69fbe4843ba26fa980a93cb SHA-1: f033d822e9bacc69d0e6d77a749879c648ad0312 SHA-256: 9b1c708fb972c2e55b13c0a0ebb8be9b6b5e4238ee14d91b3467c7eed0a4d7dd
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=barycentre+cours+2nd+pdf'. Another critical heuristic identified it as a PDF link farm, with 24 external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the primary malicious URL and other PDF filenames, suggesting a lure to download further malicious content or engage in phishing. 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.cc/pify?keyword=barycentre+cours+2nd+pdf
    • http://files.sacredive.com/uploads/1/3/1/4/131437736/ganokiposito.pdf
    • http://files.thelocal-helena.com/uploads/1/3/1/6/131636665/nizigarat.pdf
    • http://files.unitedfellowshipministries.com/uploads/1/3/1/4/131453111/patibono.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/danure.pdf
    • https://cdn.shopify.com/s/files/1/0444/3072/1190/files/bivuxijas.pdf
    • https://cdn.shopify.com/s/files/1/0437/8820/6238/files/dell_service_tag_checker.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/kogubanubivixofonomigetuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/63564925657.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/33772886145.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/94621258981.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/cyclical_vomiting_syndrome.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_off00005681.bin
650a30e66000ccd7de5a08d06a93a46794c8097fd828f6751e96cc6e3b1673ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5681 5400 bytes
font_01_sfnt_off000068f6.bin
736b6a03dca4dfb03dbc9b14d99604fe9118eaa987dd1754683965a239093977		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F6 9880 bytes

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