Malicious PDF — malware analysis report

Static analysis result for SHA-256 90df68f6f48ac60a…

MALICIOUS

PDF

32.0 KB Created: 2020-10-23 18:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef60137d5ba0440203f5f5781cba2cdf SHA-1: 37d8782f12697027e2684330072661f84ef36b80 SHA-256: 90df68f6f48ac60aeb74a74b959faf4e6c95c171fb8c23204be0e9b9f89f6e19
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. This URL is presented as a download for 'anime go apk for pc', a common lure for users seeking software. The PDF also contains a large number of external links, suggesting a link farm designed to distribute malicious content or engage in SEO manipulation. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.link/123?keyword=anime+go+apk+for+pc
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8809e4c81b0.pdf
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8754f1c7739.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mejifavo/sixidusunaguwogofowe.pdf
    • https://s3.amazonaws.com/mijedusovineti/nuwew.pdf
    • https://s3.amazonaws.com/felasorarabipis/burilojigidet.pdf
    • https://uploads.strikinglycdn.com/files/b114ce24-b845-4a6e-88be-0b9cfc446afe/30938729372.pdf
    • https://uploads.strikinglycdn.com/files/cd5d128f-1ace-41ba-a3ee-3d1e399b7262/nobepolapiwenugenarij.pdf
    • https://uploads.strikinglycdn.com/files/ea8743c0-43ff-48cc-8af9-abd4c77b28f5/95287888318.pdf
    • https://uploads.strikinglycdn.com/files/d4a9eaef-fe07-41a2-85b2-a7153ff4401b/15879985457.pdf
    • https://cdn.shopify.com/s/files/1/0494/4491/3311/files/electricity_and_magnetism_purcell_and_morin.pdf
    • https://cdn.shopify.com/s/files/1/0268/7513/4135/files/91113997752.pdf
    • https://cdn.shopify.com/s/files/1/0500/6504/7716/files/hong_kong_airport_express_map.pdf
    • https://cdn.shopify.com/s/files/1/0492/9745/7311/files/lapukenajenesuped.pdf
    • https://cdn.shopify.com/s/files/1/0477/3937/1676/files/64513717658.pdf
    • https://cdn.shopify.com/s/files/1/0482/5396/0353/files/google_company_offer_letter.pdf
    • https://cdn.shopify.com/s/files/1/0501/6243/4210/files/indeterminate_forms_and_lhospitals_rule.pdf
    • https://uploads.strikinglycdn.com/files/abf8f6ff-0a05-494a-865e-a50f6f689575/maxenexokisifejofa.pdf
    • https://uploads.strikinglycdn.com/files/6d0b6ab5-1e22-42af-9082-b6172e1380b5/movimientos_en_el_plano.pdf
    • https://uploads.strikinglycdn.com/files/672e175f-cf01-4a28-890f-de41f6dbf8f0/22019578166.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007004.bin
f728e4c4eaa95be8e21080adea0a3f9682de41d653d9b08c0ea64a8fea488a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 5180 bytes

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