Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b35ae08d2e5b16…

MALICIOUS

PDF

56.1 KB Created: 2020-09-12 18:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ed3004c957f4721831752fb53b9adbc6 SHA-1: 79c20bb22e2dbd3cbac059fde1ebec88bb685cad SHA-256: 66b35ae08d2e5b16b3df57fee6ef1ceb6e1ef4d38151b0aec6d30d5c8d4c75bf
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=yoville+price+guide+2018 In PDF document text
    • http://logipasu.jimbettsartanddesign.com/uploads/1/3/2/8/132814930/2410150.pdfIn PDF document text
    • http://jesotid.makemeupga.com/uploads/1/3/1/8/131859527/pezebik_livemiramobo_dogef_feziwexag.pdfIn PDF document text
    • http://files.affordableallwoodcabinets.com/uploads/1/3/0/9/130969965/butudukasutojav_lasos.pdfIn PDF document text
    • http://files.plainfieldgirlscouts.org/uploads/1/3/0/8/130874205/soniwosikusema.pdfIn PDF document text
    • http://files.domaci-inc.org/uploads/1/3/1/3/131379716/rezopotug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/car_accident_perth_report_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/votupedajajok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/43802801846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/nezivopisoz.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fb83f1_250a4f29ca314eeba14e09c32229ec9c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0779a3_535461b4ad6a45e8aff875e83b411186.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/64f9d2_42662e7967244b87bca3495b8ebaab67.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/zosodamawojoruzopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/punevumekefefarug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/meriremekusuvelomer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/automatic_control_devices.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off00009328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off00009d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D23 5392 bytes
SHA-256: 74934caba8ecec66194ebd2019bdcd848fc256c636347697519f656e9ddaec71
font_02_sfnt_off0000af9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9F 9800 bytes
SHA-256: 4d740ea87aaf4f4997fd0c461aefafdfb0050f91d0ce3ca238e57fd7d181e349

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