Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae4898891751732…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 11:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51aa5e8f02c93251a9111813d7aaef31 SHA-1: cf01adddbfbd7d9a354749b7666cfbeab83c51ce SHA-256: cae48988917517326879568c0377230bd18908507d01c06dc4f0a52fa80f8658
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a mass of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation. Crucially, it includes a redirector URL, 'https://ttraff.com/pify?keyword=nios+506+assignment+answer+in+english+pdf+download', which is flagged as malicious. This indicates the document's primary purpose is to redirect users to potentially harmful content under the guise of providing assignment answers.

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.com/pify?keyword=nios+506+assignment+answer+in+english+pdf+download
    • http://files.neuropolisblog.com/uploads/1/3/2/7/132712050/033194eb5cc.pdf
    • http://files.synapticbiology.com/uploads/1/3/1/6/131606758/9777384.pdf
    • http://files.jolynneharenza.com/uploads/1/3/0/8/130874204/5025234.pdf
    • http://kafazigux.winslowschoolofmusic.com/uploads/1/3/2/6/132682076/7764826.pdf
    • http://files.ebcentre.co.nz/uploads/1/3/2/7/132740515/fekazenezewilikofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/9615795643.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/36463681796.pdf
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/teluduzuwiwovuzadesetore.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/perixutojav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6326/9789/files/convert_base64_to_ionic.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/fotalavagak.pdf
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/72637833612.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/41752187376.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/megutasubexijuwujasad.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/adam_smith_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/29269719679.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.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_off00005df4.bin
59a20511db05fa75a835923d5ff5f84e32f7a668ecc168883e99b9fcf8d27264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF4 5936 bytes
font_01_sfnt_off00007216.bin
0cc62ab4877d32eb747e7f50fca033b207d7fc584f0c5351b419c6f8271a379c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7216 10180 bytes

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