Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b752c82103b783…

MALICIOUS

PDF

37.9 KB Created: 2020-08-31 17:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd0eeba6e661b74dfe1ccbdeec55e892 SHA-1: f384bcb921fbe91548a86edeef7ed2289db54cb3 SHA-256: 97b752c82103b78317e60b3ad88c984da82d20e28980bb9a3bcb83773638c9e8
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to benign Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for educational materials. The primary intent seems to be redirecting the user to malicious infrastructure via the ttraff.cc 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=cambridge+grade+7+maths+past+papers+pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/cluster_sampling_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0437/4174/1205/files/mexulibajodefogep.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/rakaxatejimizet.pdf
    • https://static.usrfiles.com/ugd/c12414_6ebf4c7e5d414c8ab2c7dc4bbade49ab.pdf
    • https://static.usrfiles.com/ugd/ea78e0_de2d7df0993f45c199192e0d013d2da0.pdf
    • https://static.usrfiles.com/ugd/ca300b_80d27238a5fd4a77b0f8e47e82884000.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/character_development_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/1562/7175/files/madopoxoxabojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/xilal.pdf
    • https://static.usrfiles.com/ugd/8acad3_6869b9add0d84b2e8656016f9538663f.pdf
    • https://static.usrfiles.com/ugd/ab63e3_78c533affe4a4d6e980faf08642d0c4d.pdf
    • https://static.usrfiles.com/ugd/02beb7_62fe7fed0b9542fea8623e50a95fcd90.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_off000055c0.bin
1571bcce9a8df0cdaf57826b970af4e04e97cb289e126e2b4df9060434bce670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C0 5548 bytes
font_01_sfnt_off0000686d.bin
4aace5a832e8fd7aaceeab23e561628d6a7ffbf50b076d589a37ff566866e922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 10176 bytes

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