Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fe6e56ea72e2ba…

MALICIOUS

PDF

39.6 KB Created: 2020-08-14 22:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68fc9eae11082cd186ea9efbc9e3c643 SHA-1: f4e8c363d77c775f3edf619dece2db5aed4f4ef6 SHA-256: 98fe6e56ea72e2ba0f34fa396d62e8410ca21cd25263d81ccd5d55265705ae45
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the target URL and other Shopify links, suggesting a lure for educational materials to mask the malicious redirection. No scripts were extracted, limiting the analysis to the document's structure and embedded links.

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.ru/wb?keyword=ethiopian%20physics%20grade%2010%20textbook%20pdf
    • http://files.rkspeech.com/uploads/1/3/1/4/131438249/9075954.pdf
    • http://files.burgeshsband.com/uploads/1/3/2/6/132683088/faduxi_gujez_rudofixipis_lowalewesijujil.pdf
    • http://files.leahrempelphotography.com/uploads/1/3/0/7/130738507/5997670.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/33432223852.pdf
    • https://cdn.shopify.com/s/files/1/0434/6927/5286/files/mufoxazubebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/pigid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/69526919593.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/mibofudobeza.pdf
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/chrome_manager_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/0113/3731/files/responsible_parenthood_and_family_planning_resource_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/51768714460.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/51585438532.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_off00005b99.bin
349f6d302e072766a24083b542b99d2c11dc3eddcbbd70c916144ff4123db195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B99 5908 bytes
font_01_sfnt_off00006fb8.bin
7fc9431913b12f9361180b15fdca4582fcfb1d8bd26aed29510aac0ac4121787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 9940 bytes

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