Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1540487780477d2…

MALICIOUS

PDF

32.0 KB Created: 2020-10-26 02:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd8a9db9944f75bfc55be2a431b94cb SHA-1: 82715111b582d5b706527a205b3b9402b4afc858 SHA-256: d1540487780477d2ba4901a41b42b7277f87d19da8cdd01bd948073828ef1e1d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that clicking the link will lead to malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic suggests a large number of links are present, likely to obscure malicious intent and potentially distribute malware or phish for credentials. No scripts were extracted, but the presence of numerous links points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.me/123?keyword=intellectual+traditions+in+south+africa+pdf
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8876535ab33.pdf
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f88fdcbda16b.pdf
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f8a327eda28d.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f93e59d7a14b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0485/7040/0928/files/gta_v_weapon_pack_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0501/5899/3573/files/2069341491.pdf
    • https://uploads.strikinglycdn.com/files/9bbd00c3-4737-41d3-a04d-fa1987df5820/42701683628.pdf
    • https://uploads.strikinglycdn.com/files/97d34c08-e214-4618-b87e-48061a781b35/fufuzosakiwuv.pdf
    • https://s3.amazonaws.com/sojuravewi/kogizuzudatepodi.pdf
    • https://s3.amazonaws.com/sinadi/xotiwane.pdf
    • https://s3.amazonaws.com/sugaguxagu/73757568300.pdf
    • https://s3.amazonaws.com/degagaziv/banking_exams_questions.pdf
    • https://s3.amazonaws.com/tuxutedi/manual_design_of_residential_building.pdf
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/16187996937.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/rugisipokatagutubujixe.pdf
    • https://cdn.shopify.com/s/files/1/0497/4755/8563/files/footej_camera_premium_full_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5516/files/46687277758.pdf
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/security_council_resolution_1973.pdf
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/13519238423.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f90.bin
c957503b5700fb03db3c23aa5a012a70db513be24330ed5098b2f6184a67631c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F90 5064 bytes

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