Malicious PDF — malware analysis report

Static analysis result for SHA-256 2540561246d1eb2f…

MALICIOUS

PDF

57.4 KB Created: 2020-08-08 23:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e9a3a31e1e2bee0315f6466202e8d55 SHA-1: cbf40170ff94c4f274d3d00fe81d836b570a9c54 SHA-256: 2540561246d1eb2fa073dadfb23a205a0f87300c33ee09d38a4603f5073a1a18
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure related to 'Amadeus reservation system pdf' to trick users into clicking the malicious link. The file also exhibits characteristics of a PDF SEO link farm, with numerous links pointing to various PDF files, likely to obscure the malicious redirector.

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=amadeus+reservation+system+pdf
    • http://bejekule.shoptaradise.com/uploads/1/3/1/4/131482995/zurud-nibojuxamubu.pdf
    • http://files.iuppuci.com/uploads/1/3/1/4/131406300/680bb90523.pdf
    • http://raxinifo.dietislab.org/uploads/1/3/0/8/130874422/netulakixepa-rerer-moposi-namogiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/30125765425.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/zifamapewamin.pdf
    • https://cdn.shopify.com/s/files/1/0436/6496/5782/files/kazolobuzakagu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/wemusudeguresazati.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/aia_g701.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/definition_of_absenteeism_in_school.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/easl_cirrhosis_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/midalibiket.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/easy_way_to_learn_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/scales_and_arpeggios_for_saxophone.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_off0000a376.bin
7b4e834043910d344f426fe3ee998066ee922a47ef38cc8160b4ba514aef182f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA376 5304 bytes
font_01_sfnt_off0000b574.bin
fc1294f31d431b938e1094c644236a069373ad1986b38630ddd958f0a38483df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB574 10376 bytes

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