Malicious PDF — malware analysis report

Static analysis result for SHA-256 5568fc8b87887d1c…

MALICIOUS

PDF

38.2 KB Created: 2020-08-20 02:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8752a8075f837f293d6cd29bac83a9d6 SHA-1: d030cb15938f9598c27e5e74d634332a47c16081 SHA-256: 5568fc8b87887d1c5dc7a4fd2f2436dbae037ce0b1ce5f609076e4ce215a4591
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=calculus+integration+techniques+worksheet', is designed to lure users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The primary intent appears to be directing users to potentially harmful content through deceptive links.

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=calculus+integration+techniques+worksheet
    • http://viduxej.palestine100.net/uploads/1/3/0/8/130814526/5d8d7fc264a.pdf
    • http://gawibo.wpnpower.org/uploads/1/3/0/7/130739415/wobebek-zebuxixiwisetup.pdf
    • http://files.bongmontesathinkingschool.com/uploads/1/3/1/3/131383541/refuselibar_pimekazivadu.pdf
    • http://files.audiobooksnz.com/uploads/1/3/0/9/130969695/febozune.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/xamenejibujozat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/tikaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5984/6051/files/aci_sp_4.pdf
    • https://cdn.shopify.com/s/files/1/0452/2138/0247/files/english_suffixes_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/1850399155.pdf
    • https://cdn.shopify.com/s/files/1/0446/9296/3484/files/basketball_court_measurement_in_meters.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/56758362164.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/24303175719.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/marvel_s_avengers_infinity_war_prelude_2020_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/40640856529.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_off00005868.bin
7c6298075402de5495617364c93bbf07474ffa8e0358d6d3b3e9c394818e01ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5868 5248 bytes
font_01_sfnt_off00006a3f.bin
76258bfbd5decf10af257984783ea9a1f008ee5aeb79b659efd8d9244b54cabe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3F 9920 bytes

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