Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa28b833023838c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 10:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f1bcd96604fd7bae851d3429c511657 SHA-1: 13984dea985a7f7b36b1f37a6b40e8332ece9aab SHA-256: 9fa28b833023838c46394627f7cde670e84fa1345bfb73710042651f31b1464b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic. This suggests the primary purpose is to redirect the user to a malicious site. The presence of multiple Shopify URLs, while mostly benign, could be part of a broader link farm strategy to obscure the malicious redirector.

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/pify?keyword=racing+boca+unidos+formaciones
    • http://files.sailingwildhorses.com/uploads/1/3/1/3/131398598/lepogi-tebonajagabuvet-xatosevepidoji-kafadomonubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6868/6497/files/48964892634.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/45594431328.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/58559435740.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/20955732769.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/kiburapagutisemagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/zadupixoliko.pdf
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/16143807381.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/fatinedamafisasevuxesuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/airlock_system_in_pharmaceutical_industry.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/edexcel_biology_a_level_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/dukubumodaribavamijowopu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d2a.bin
b8c6afe97aff293b9f6c78e0160bebb29275f193287c20080db504961c9da826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 5256 bytes
font_01_sfnt_off00006ee2.bin
5138ac364c9ff7e8b35b0441570ba53c4d6bafaa143bd661d76f566552eb4ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE2 10096 bytes
font_02_sfnt_off0000915e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x915E 4324 bytes

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