Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27e0b34b2f29344…

MALICIOUS

PDF

50.5 KB Created: 2020-08-31 04:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 004d700ea70d784a6eac1350e9f1c361 SHA-1: a70c35e7930cf41ba704996ad55e250c75d3a6ab SHA-256: b27e0b34b2f2934428f41035472edc53aa31c6aaeb5bf0503e5ae66ab53878a6
150 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download for free Christian books, which is a common social engineering tactic. This link, however, redirects to a known malicious domain (ttraff.com). The PDF also contains a large number of other links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt to mask the malicious redirect. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=descargar+libros+cristianos+gratis+para+jovenes
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/lokebizikejalufetegeri.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/nepejole.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/duwedumiriwekakidumoreto.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/nedudibedu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/bofusosiwo.pdf
    • https://static.usrfiles.com/ugd/b8c837_237d3ab74ea845c88c79e92779e2444f.pdf
    • https://static.usrfiles.com/ugd/0baf77_e1415f6caa5c4e71b8f4c59acd786f90.pdf
    • https://static.usrfiles.com/ugd/b8c837_010d7a20908c40c0b5541ef180ae64c3.pdf
    • https://static.usrfiles.com/ugd/5b9a87_3eb13e97d3f5435a8b7778fcdccfff64.pdf
    • https://static.usrfiles.com/ugd/b47706_8f0dd6aee39f4844a1d367161b162f64.pdf
    • https://static.usrfiles.com/ugd/902d29_c6c824296b4b4060b29100bb1b6caefa.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/authority_of_the_believer_scriptures.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/bimubunitexukozosubi.pdf
    • https://cdn.shopify.com/s/files/1/0462/7084/0981/files/cameroon_music_zangalewa_video.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/atividades_para_educao_infantil_5_anos_alfabeto.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/codycross_answers_group_383.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_off00008309.bin
d5bbf3337322b4ae9868b2a39daa630cc7083cac57e377c9e2cff760d1cb5cfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8309 5376 bytes
font_01_sfnt_off0000956a.bin
4d4ef8ef05736781dd7b1260893a1b88f763316b23fc09230ef75f9b3f0fcb0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x956A 11856 bytes