Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e74a0664b3b20f…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 23:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4782f6628f5e8ade95bb096fddccf542 SHA-1: 27a25218e646b20b1b10d7b2e5009e83a60443f3 SHA-256: a7e74a0664b3b20face130e02bc1b6efa9318ee063fe05f0b23a490f81e29b62
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ncert science book class 11 biology pdf' and the malicious URL, suggesting a lure to trick users into downloading potentially harmful content. The presence of a link farm indicates a likely attempt to distribute malicious files or redirect users to phishing sites.

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/pify?keyword=ncert+science+book+class+11+biology+pdf
    • http://files.blackstairsconservationconcern.com/uploads/1/3/2/7/132710689/lesijumipodoxe_jiwuxizofuxalu_weteketogef_gexisu.pdf
    • http://files.jasontorrez.com/uploads/1/3/1/4/131408169/nulevefesid_xozadaxexapige.pdf
    • http://files.oakstreetpto.com/uploads/1/3/1/6/131606670/bebezubuwavizixobava.pdf
    • http://files.chrisdreliszak.com/uploads/1/3/0/9/130969368/fe8d11a1d3a975.pdf
    • http://files.bristolhairdressing.com/uploads/1/3/2/7/132740501/zotuvilegilanulivik.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/kuzulakawasasavavif.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5481/files/74176141522.pdf
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/revenant_dragon_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1047/files/77239443792.pdf
    • https://cdn.shopify.com/s/files/1/0447/3529/9738/files/arap_bahar_ve_tunus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0374/files/muporiwufugumoratotomanob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/27092690165.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/standard_size_of_building_components.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/xivapek.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_off00005e33.bin
d402364bb2ff480f30ec2dcf0757185bb8ec65aa9fa82b940d4a02ff759bd4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E33 5648 bytes
font_01_sfnt_off00007189.bin
1e7265322c38a94a929a27f1fee8029e4b04f335f096a11d7b7fe0b9aee79e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 10008 bytes

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