Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3799d30881075e2…

MALICIOUS

PDF

63.9 KB Created: 2020-10-17 08:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fa07cc68688cd485cbfdd7e67455f9b8 SHA-1: 56a6efe623ff3e68ff9034fdd2042db8b99bf9de SHA-256: b3799d30881075e2759eacd20ac519f70ff4a4c2d173448ee20994a2716f53d0
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, cctraff.ru, which is disguised as a 'Danfoss fc 302 operating manual'. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9179

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://cctraff.ru/strik?keyword=danfoss+fc+302+operating+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f88132697729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f87b3c1d5def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f8a6f32b4c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f874fe42acb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda7b1fd-862c-4471-961e-a0537ee99c27/jutanuvidinolowonulopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70595ea1-fb79-4df1-a990-a45e83e6a4ab/36654494705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0780/7125/files/75964397767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7043/8555/files/boy_over_flowers_manga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8881/7562/files/mewalivikezadofarawejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/9525/1102/files/5e_opportunity_attack_invisible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7210/2822/files/zasidusaziwimagevizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0298206d-a727-44ee-8768-ea4b84821e1d/41269745132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2534572-d626-4f0b-9895-bb25c1a43572/75945436781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e2f497-b7da-4f43-8137-419c0671d1d8/vejubafizanimogelipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44381799-b019-4277-a82a-683769bc78b0/7131784256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806c4061-2477-4a5d-8706-02b725a9d98a/kikimofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec5d562-54af-43a7-b8d8-c5df32da7fc4/judopakur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18505712-1c0b-47f6-8fc7-908e8f2acb20/nowokuduvipitoxuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4faab24-c2f0-43a4-b76a-ec2a106389b9/tangram_figuras_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1708600f-49b4-4d91-b8d1-90b1e45a80c1/75509238578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9931/1268/files/fixused.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8360/0550/files/gudamulijutuwowud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1509/4439/files/71762816265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1805/4555/files/bighand_create_user_guide.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9104 10176 bytes
SHA-256: 735fc4428d485f2a61c7da0bb4eef0c4a91533345f4b792d20d379b5d48b9bc7
font_01_sfnt_off0000b2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BB 5652 bytes
SHA-256: 699baea898acee1b0e05f752443af8a07007404b1a049253db0264bd93af8a0e
font_02_sfnt_off0000c5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DB 16928 bytes
SHA-256: 8ee3112a05fa9885a4391d03b3b603d8519439a6e269cd774d321f41df3e519f

Open this report in the interactive analyzer, or submit your own file for analysis.