Malicious PDF — malware analysis report

Static analysis result for SHA-256 232618a455f456cc…

MALICIOUS

PDF

42.7 KB Created: 2020-08-10 17:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c2e25645004d3cd9e0e5642e6eb16a SHA-1: 8e99dea688d6f84cfeeb0617f59ff3221e27066e SHA-256: 232618a455f456cc1eee80e5c93a6beffecbad6f7586428782fc748256880791
120 Risk Score

Malware Insights

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

The PDF file contains a link farm of numerous PDF files hosted on various domains, including a primary malicious redirector URL. This indicates a likely SEO poisoning or content distribution attack. The heuristic firings confirm the presence of a malicious redirector and a large number of external PDF links, suggesting an attempt to lure users 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.ru/pify?keyword=guia+ceneval+pdf+preparatoria+2020
    • http://files.tales-trails.com/uploads/1/3/2/7/132712115/bututasiseguv.pdf
    • http://files.londonceramicscultpureclasses.com/uploads/1/3/1/3/131379276/1960563.pdf
    • http://bunada.stmaryofthesprings.org/uploads/1/3/1/6/131606289/luvoruzebot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/85916681308.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/rediveragojafex.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/apprendre_le_franais_dbutant_livre.pdf
    • https://cdn.shopify.com/s/files/1/0437/3754/6917/files/82325197612.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/heroku_reset_database.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1665/files/japiwalubixozawewutopez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/windows_10_upgrade_advisor.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/xenebugefifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/wofuliliki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/sozixumulavurazizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/wesetamobunomazug.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_off00006730.bin
d1b3b49d29895b54952014636e2c310cdc2602f98779f10f3c5cb9b403bd73f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 5336 bytes
font_01_sfnt_off00007973.bin
5d2ae4f0deb3190152804ec0ee4402b0dcdedc16eb5d2ee6075cfb5bf2bcd8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 10644 bytes

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