Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c03126f0ed37084…

MALICIOUS

PDF

47.5 KB Created: 2020-08-30 05:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61aba849dbbc0cdc146dd0d3d9acb95f SHA-1: e61001e2c36e2f07b6ed268c01f0612e98899de7 SHA-256: 3c03126f0ed37084f1e872682bbb728ab1c95b3ea2ca7a8f2db724897b38a2cd
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The presence of a link farm heuristic (PDF_SEO_LINK_FARM) suggests an attempt to distribute malicious content through numerous seemingly benign links. No scripts were extracted from this sample.

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/wix?keyword=dr.+seuss+green+eggs+and+ham
    • https://static.usrfiles.com/ugd/3f0e57_968b47701341417eaffa782bf5456042.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf9afa210ccd4576ace0f8eb31f8251d.pdf
    • https://static.usrfiles.com/ugd/41a0b6_8b6563cfa412407992f82dc7d20324aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3eed76385524d2680b120440fff8d88.pdf
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/lokeduw.pdf
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/jumanji_2_trke_dublaj_indir.pdf
    • https://cdn.shopify.com/s/files/1/0435/7842/5507/files/corazon_de_nio_partitura.pdf
    • https://static.usrfiles.com/ugd/ee4a13_c4640a39229148478d2b4e5dce703e12.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dca233853b44c6e80c6aa52ceec16bc.pdf
    • https://static.usrfiles.com/ugd/cac9e4_64c7b991e09c4a7cb418028cbd492f57.pdf
    • https://static.usrfiles.com/ugd/b8c837_25905f369a5344ee9f6c6aa81377c426.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/cactus_flower_play.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/unizik_admission_list_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/algebra_2_exam_review_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000671c.bin
982eee3158b4f73fef1a3c8f456c7b380f8232aeca12bfa9a69ec02190a5e015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 4692 bytes
font_01_sfnt_off0000778e.bin
10d73c295e25a6f8b61386a56de4093bdfa1dca7b7cc77df8a8b44954b8dea07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 5240 bytes
font_02_sfnt_off0000892f.bin
4ce5edd19ba85d7de75ecbc0a9f179beb20594edf590948157bb4eb6fc27c6cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 12032 bytes

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