Malicious PDF — malware analysis report

Static analysis result for SHA-256 44951b724c2eb423…

MALICIOUS

PDF

45.9 KB Created: 2020-09-07 02:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4451f9c2a1dd0286328f97e26e830dfa SHA-1: 1a4c9fa140fb183d51f3d571a353a1d6427d002d SHA-256: 44951b724c2eb423bec15fc702340744ec6cfbec9d53217cc800c4140552ba96
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=mathematics+worksheets+for+kindergarten'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a deceptive lure. The primary intent appears to be redirecting the user to malicious infrastructure.

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.me/wix?keyword=mathematics+worksheets+for+kindergarten
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/factor_analysis_and_cluster_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/bugifurigiwexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/88935318863.pdf
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/dreamboxedit_without_setup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/paediatric_bowel_preparation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/babonemasuvokogazunufuge.pdf
    • https://static.usrfiles.com/ugd/b8c837_053c0258328d466fb7a69ceb52b4bdd0.pdf
    • https://static.usrfiles.com/ugd/bf650e_a23cfd0858f449d7be2954ad0fd645a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_d967a99cd044451d89a542901f258b04.pdf
    • https://static.usrfiles.com/ugd/b50c55_5c4a5d1c884e4d149c03e07afec4cbdc.pdf
    • https://static.usrfiles.com/ugd/536122_9e846b425ad14417a3fdc734089af2cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b617370c43ad47229a90c2b3610463ac.pdf
    • https://static.usrfiles.com/ugd/ab5adf_4823ad27ab9f45428bfde1ce44880a6f.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_off00007533.bin
0b09602912fa177910f8201a5dbce740aadc97f11b93f9b90405398fe7717c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 5564 bytes
font_01_sfnt_off00008812.bin
cc9a33d8585e40d10bc2ce8ca89cf3f242828a0c57699dc98a78badc3f9c96bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8812 10208 bytes

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