Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36cd2a57511ef22…

MALICIOUS

PDF

83.0 KB Created: 2020-08-12 08:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b1b4903e3d28c65bcce7a2a338f6450 SHA-1: 55781bda6c10cae0ab37f8a94532b6305fe71acc SHA-256: b36cd2a57511ef2295fb0821f4e3c6d6c6c96d22fee30791481b210b9d016133
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One of the primary links, 'https://ttraff.ru/pify?keyword=fun+personality+quizzes+for+adults+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to potentially harmful content through a deceptive lure.

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=fun+personality+quizzes+for+adults+pdf
    • http://files.drorangejuicer.com/uploads/1/3/1/8/131871907/zimibawekapes-furoluviri-zumewosuxotigin.pdf
    • http://files.hustlecary.com/uploads/1/3/1/6/131606059/4149304.pdf
    • http://files.nudeandtrue.net/uploads/1/3/1/8/131871992/durod-dimuka-jopatoderofexuj.pdf
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438150/827431.pdf
    • https://cdn.shopify.com/s/files/1/0437/4754/1153/files/vugukikiregazutesilal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/zulelenuvawifebe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5759/1960/files/xekokozifowegorasudamufiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/32789015547.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/vinayaka_vratha_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/algorithms_robert_sedgewick.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/90587690483.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/3685117778.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/preschool_phonics_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0438/4092/9957/files/make_directory_python.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_off0001084c.bin
240d784f2a86144cdfe6ad83169e3aa350be18d77e16e0437e583623fb6892e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 5268 bytes
font_01_sfnt_off00011a4f.bin
0dfd27308703425b8a46a7053daf2adf5f40eeed3da0e7fe5d010912e4b52d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 10564 bytes

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