Malicious PDF — malware analysis report

Static analysis result for SHA-256 350e2b9157e898dd…

MALICIOUS

PDF

40.7 KB Created: 2020-08-14 19:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3019e5f6b2cb77729c748eda6f5bff0c SHA-1: d0d9877c0e1c008ed24fcaeb69c7915c8a22b109 SHA-256: 350e2b9157e898dd1147609038648c5f684e188ef2c278a57e572eb7790207aa
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure to download a 'PDF editor trial version free download', which is a common social engineering tactic. It includes a mass external PDF link farm, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body itself contains multiple URLs, including the malicious redirector and several benign Shopify links, as well as a link to a potentially malicious domain.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wb?keyword=pdf%20editor%20trial%20version%20free%20download
    • http://files.biddislifestyleweddings.com/uploads/1/3/2/6/132681033/bubefizikok.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/54795480997.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/42261596488.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/jerefu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/28876824490.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/xizitoxefiwuduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/jixujid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/sql_interview_questions_and_answers_for_3_years_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/45476093935.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/ripad.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_off000061e9.bin
775a79a74602c190e9e1b0add4fe7dc6467a30bf023a9a16f7d4810cc8122707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 5056 bytes
font_01_sfnt_off0000733d.bin
8bb63b7136fad196ac36323d0238bdb2dddc780b713f8b4e175535675e1aa154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733D 10304 bytes

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