Malicious PDF — malware analysis report

Static analysis result for SHA-256 3125aa493ff2dcba…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 20:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d733716e0216692b594fd8619169a3 SHA-1: 6a5bfa39c1b3def6db83ebde6d6e833d30819dc9 SHA-256: 3125aa493ff2dcbaf5f747a6d5facf93bc46ee7bd4121b72a318ccd8b0e74e91
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title related to social stratification, likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=functionalist+and+marxist+view+on+social+stratification+pdf
    • http://nubapajaz.homehomeschool.com/uploads/1/3/1/4/131483027/jepafapuma.pdf
    • http://renotoz.inspiredleadershipcoaching.net/uploads/1/3/2/8/132814930/8717151.pdf
    • http://files.bridalgownsnh.com/uploads/1/3/1/4/131410007/9604557.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/iccid_number_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/pdf_to_word_converter_nitro.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/xulepipatinuxepimukite.pdf
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/port_clinton_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/beporir.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/bams_1st_year_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/sufigixubamowakusanov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7298/7046/files/nunerizakotekitopodenuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/99810512996.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/javevividesumiduvim.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/51669260036.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/tibalogifuwusasuzor.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_off0000665a.bin
8706ae49f1a0af3194f009325c0a936fc81398cbba55acf43b551cec7986cd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665A 5476 bytes
font_01_sfnt_off000078f8.bin
97c02c0e1b87674ba2c0c8ea3aaa8343a465538c8af6ffe003b22a601c5cb154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 10428 bytes

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