Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdafa3e00b0f771…

MALICIOUS

PDF

45.4 KB Created: 2020-08-07 09:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b6efa8bc3575eef4b16fbb6162a5d6e SHA-1: 6403023d4179194734115b987fe9bc9d5621a89e SHA-256: 2bdafa3e00b0f7714aa991fff31da82ebf7d80fdc90bafd5bbae203f678c2f0b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body text, though heavily obfuscated, includes the URL and keywords related to an admission list, suggesting a lure. The primary heuristic indicates the PDF links to malicious redirector infrastructure, and another heuristic identifies it as a link farm. The file's purpose is to redirect the user to the malicious URL.

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.ru/pify?keyword=unizik+admission+list+2020+19+pdf
    • http://files.gregorywsaxton.com/uploads/1/3/2/7/132710627/kutewosujimuriwatado.pdf
    • http://files.hudsonvalleyrwa.org/uploads/1/3/0/7/130776487/3176879.pdf
    • http://files.blackraven6.com/uploads/1/3/1/6/131607047/9809800.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/classroom_language_esl.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/remabuligifirafezed.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/43811196214.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/66103873079.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8514/files/92179653131.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/54597858942.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/10968437124.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/34933181798.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/mefukoxibav.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/11463162256.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/kinurigira.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/applicability_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/5797/8273/files/ladotifonorixe.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_off000071ce.bin
a21bb93292c7f59c75b85e89e9fb0e8180cad27ff2abe870dbb44b15d9354307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 5676 bytes
font_01_sfnt_off00008525.bin
913dc20b8b0b5618d9d0a9c08cd4eebdb99171cf90ed4193631ac71a9e00f12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8525 10356 bytes

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