Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e3fe0b4df44c83…

MALICIOUS

PDF

38.9 KB Created: 2020-08-29 07:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a0ef3adc26a3fc77e0d5746eafcf13 SHA-1: c35d66e17785f5ed457b0eab59441cf315bb26c0 SHA-256: a4e3fe0b4df44c8336bfee58a8627c1eed8165832e78ddb9a0694ed03332ac3a
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector. The document body explicitly contains the text 'Download norton ghost 11.5.1' and a URL pointing to a redirector, suggesting a lure to download potentially unwanted or malicious software. The presence of a 'download button' heuristic further supports this attack pattern. The primary IOC is the malicious redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=download+norton+ghost+11.5.1
    • https://static.usrfiles.com/ugd/b8c837_8e08d37e535c43a5b82f4c78f1e535e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_76d394e99c434193bf5dbacb09df8dd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_93c20e3567df492a89092aca5e2fb675.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b83ba9f52654c109a5396a7da65834f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9febdd514ec6458a97a8231d5d83d1f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_45f32cf3ec2948f5b6d9871cdedec016.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/11409383755.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/personality_adjectives_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/tetusuvotoxinukagaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/89317467740.pdf
    • https://static.usrfiles.com/ugd/b8c837_04575e3c877248a19f699182ba6cc4b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea274ce4b2c140c895b4c319e94a1caa.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5ae9a90c8c14b5182aadd6f33253d2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_295d1b478cd3491e9d6f63357d716718.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_off00005a89.bin
f18c628931254fbcfd23a0104c3290f96d3ac08b5993df46e449aef1cd1cf501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A89 5384 bytes
font_01_sfnt_off00006cec.bin
5a25ea60de7aafa813859f9a0c7735b0fb1606fb89edf682f6e3c8a0dfb926cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 9988 bytes

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