Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c80d180b347097…

MALICIOUS

PDF

50.3 KB Created: 2020-09-07 18:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fe3aa88a94a6ba9f591b11ae95956cb SHA-1: caf689e2110f526ece8cfdce1af28eb451108613 SHA-256: b4c80d180b347097a1483ae0478dd14c346fb98cf869922ed9076eede2e69705
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector URL. The primary link, 'https://ttraff.club/pify?keyword=cambridge+5+test+4+reading+answers+pdf', is flagged as malicious. This suggests a social engineering attack aiming to redirect users to harmful content under the guise of providing academic 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.club/pify?keyword=cambridge+5+test+4+reading+answers+pdf
    • https://static.usrfiles.com/ugd/e73fea_28805a86e32b428a97fbbe1bb3181eab.pdf
    • https://static.usrfiles.com/ugd/361045_4fd0fb8036a049c9b04570cfb23a7dc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_439cb3377941494f903a4dad124ae329.pdf
    • https://static.usrfiles.com/ugd/d1c05f_d05550a845704f978a2ab31327adda52.pdf
    • https://static.usrfiles.com/ugd/bfbc46_36d06009662249a39eb3e035264f1237.pdf
    • https://static.usrfiles.com/ugd/98d33d_25a53b9458574778a8d0152818e98935.pdf
    • https://static.usrfiles.com/ugd/b88e3d_007c22bea8004c5993ac797f4aedea34.pdf
    • https://static.usrfiles.com/ugd/07ef24_7f533a35b30b4d1499aba34516a56f16.pdf
    • https://static.usrfiles.com/ugd/5a4aad_86fde52950224a0db44aad6ef383764f.pdf
    • https://static.usrfiles.com/ugd/69b86f_24d5b3e9dfde4e0098e8cebd2d790ca0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec3edfbd5ac74a0994f2828b8d9f8f64.pdf
    • https://static.usrfiles.com/ugd/e80f4c_c83e8eb6073042d79c4f0e9b22836ec7.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_987d809602c24d458a20fc74c2d84cd8.pdf
    • https://static.usrfiles.com/ugd/469aea_194798c7d5394094af746e8d0d292bba.pdf
    • https://static.usrfiles.com/ugd/ce77c6_d045c33a50114013ab8b0db2c8adecba.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/odoo_12_edit_invoice_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4250/files/bataan_nuclear_power_plant_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/zunijijil.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_off00008422.bin
3b6c8d1c3feff916cdc305a43850ec71d7911a6b8bcff72f92e118b0183a16d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 5676 bytes
font_01_sfnt_off0000976c.bin
3e712055424892ffd56a2fd207d5dab6d5a12a0396afa5f6dbf251b54f2cee10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976C 10920 bytes

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