Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12669d32304e8cb…

MALICIOUS

PDF

48.5 KB Created: 2020-08-22 19:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6874f08359dc2c4dbee03701e67d55f6 SHA-1: 27b2020553a37a1b07ead2126f28c0d0dd4f680a SHA-256: a12669d32304e8cb25d34b22366a50ef6c2cc00a7cfa7f1effef46f50c43c98d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=sector+area+of+a+circle+worksheet+pdf', is designed to redirect users to potentially harmful content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. While some Shopify links are benign, the primary redirector is malicious, indicating a likely attempt to lure users to a malicious site under the guise of educational material.

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=sector+area+of+a+circle+worksheet+pdf
    • http://files.petaciraolo.com/uploads/1/3/0/7/130739919/4935dee838e.pdf
    • http://sivusopo.pskehal.com/uploads/1/3/0/8/130813592/bekatapike.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/rilolipidijuserimagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/21817638896.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/guxipuvaretijesamaraz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/jean_baudrillard_simulacre_et_simulation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/repixofilumafuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/resume_and_cover_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/canon_camera_connect_apk_for_macbook_pro.pdf
    • https://cdn.shopify.com/s/files/1/0440/0395/0742/files/anticonceptivos_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/59459675677.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/romorubuxitukuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/alphabet_small_letters_worksheet.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_off00007892.bin
0db7f962d5007be24fc42ccef1c78af261ed13e4fccc6f091508be9658379e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 5500 bytes
font_01_sfnt_off00008b47.bin
0693089d119f7ceaccf566af491e36a6d4468cd84d0e02e11d8c7d6a0a356863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B47 13472 bytes

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