Malicious PDF — malware analysis report

Static analysis result for SHA-256 39223182fb3a65fd…

MALICIOUS

PDF

25.9 KB Created: 2020-10-22 15:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15200d314879fc569b93630c92fd64cf SHA-1: 62eacd6282ee9d4fe1dd7dc192d27f846b320940 SHA-256: 39223182fb3a65fdea23c385f9848a8d8b875fde4e9247e644f8f2e8c58b3f69
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, also contains the same URL, suggesting it is the primary lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 2

  • 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.
  • 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/123?keyword=opposite+adjectives+exercise+pdf
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f8d87af13bc8.pdf
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5f8c5783f2e6a.pdf
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5f8f5ba7e7491.pdf
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5f8eb898da354.pdf
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5f8c831ce6f89.pdf
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/9783592.pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdf
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/e99127a.pdf
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/pogozagipoz-limazonivarinin-litexexakokabod-zalasudawaragur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mijedusovineti/39013214613.pdf
    • https://s3.amazonaws.com/fuwawibu/kazejezupamalixibaf.pdf
    • https://s3.amazonaws.com/susopuzupure/17840308346.pdf
    • https://s3.amazonaws.com/pazovugal/gedifuzojolijub.pdf
    • https://s3.amazonaws.com/sugaguxagu/alesund_tourist_map.pdf
    • https://cdn.shopify.com/s/files/1/0505/2379/9723/files/norton_theorem_solved_examples.pdf
    • https://cdn.shopify.com/s/files/1/0268/8063/9146/files/renikig.pdf
    • https://cdn.shopify.com/s/files/1/0478/1103/5295/files/83828613270.pdf
    • https://uploads.strikinglycdn.com/files/aea26791-1fd4-4bb1-b4e7-3c194b8f5145/49509996507.pdf
    • https://uploads.strikinglycdn.com/files/dfecd482-c1f6-4490-baf0-95fb32a8134f/ejemplo_de_permuta.pdf
    • https://uploads.strikinglycdn.com/files/17e6079d-7444-4db3-9a4c-53b074bed499/sumokites.pdf
    • https://uploads.strikinglycdn.com/files/5cda64e2-eeb9-4062-be87-b17f41a34277/zesawimojufekowofuli.pdf
    • https://uploads.strikinglycdn.com/files/3d1139a4-8740-4950-9378-2548f375a76b/zinuzigoviziwatawene.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d2a.bin
0f6beed2ff5b2ec762052cda06898a70a7bfd6b2075851f6a4c7d801fcdfa422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2A 5348 bytes

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