Malicious PDF — malware analysis report

Static analysis result for SHA-256 c000e0f963427bec…

MALICIOUS

PDF

40.4 KB Created: 2020-08-29 15:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b83e8aa0847b938740df713610f8f176 SHA-1: 7501eb750349d2972017394bff337a8e8c6768f0 SHA-256: c000e0f963427bec39b2b9f9e738e9e451941ef769c702d2102c5f1fcb7571b8
150 Risk Score

Malware Insights

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

The PDF document contains a link to a malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, includes the phrase "Free math worksheets grade 1 word pr" and the malicious URL, suggesting a lure to entice users to click the link. The PDF_SEO_LINK_FARM heuristic indicates the presence of multiple external links, further supporting a malicious intent to redirect users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=free+math+worksheets+grade+1+word+pr
    • https://cdn.shopify.com/s/files/1/0431/9694/0448/files/balancing_chemical_equations_worksheet_advanced_level_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/minazawizaro.pdf
    • https://cdn.shopify.com/s/files/1/0462/6015/8613/files/72794564620.pdf
    • https://cdn.shopify.com/s/files/1/0467/5190/8003/files/cartier_water_resistant_swiss_made_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/6909/3541/files/latalilelam.pdf
    • https://static.usrfiles.com/ugd/b8c837_c42e6703235b46b7b7d138508d0cc301.pdf
    • https://static.usrfiles.com/ugd/b8c837_82af11890f774fe18371512c7932ec58.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6b220cd9027416581aa06a027d7ee98.pdf
    • https://static.usrfiles.com/ugd/b8c837_7254b13464f7453bb03adde8555a7a0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffaf3c61f6b24b06917941de46807d89.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fbf20b3a4684a5ba762c53a39b1ad9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c745da03750044f99e6ccb6407b391d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62dca9eb4164cc580e4e8856dd25dcd.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_off00005f3b.bin
9e1367ec17da570227d6f05fa1ba3606103833f66bf65fe46c35573c21cf03e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 5504 bytes
font_01_sfnt_off000071e5.bin
e61c871acf75dcdd7b4222d25693c9c50e086cff8275e064e04ff6d18c65c6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E5 10288 bytes

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