Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5cd1187fac9c7b…

MALICIOUS

PDF

41.8 KB Created: 2020-10-31 02:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b08ed1568af09f7e5f9af5c64663e5f0 SHA-1: 150c54577ea37211156f4f5d8bdf3dfac44b31b9 SHA-256: 9b5cd1187fac9c7b57c45903cf7bf3cae5cf8b6600ec82f65675b5f9cac85e32
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms designed to manipulate search engine results. One prominent link, 'https://ttraff.ru/123?keyword=noaa+diving+manual+4th+edition+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/123?keyword=noaa+diving+manual+4th+edition+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://jinezosibe.weebly.com/uploads/1/3/4/4/134454760/nobekon-molawiviwikak-dawurok-temowo.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/nixeku_fixagedu_vosimuxazuxitat_vokusa.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/8539950.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/1194244.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/nonanufix.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/gamotedumofesug.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/1/0484/9523/1126/files/add_cordova_plugin_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8147/5267/files/75282355170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6252/4602/files/burifiruruxojajekuxuwof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38c06d9-7be7-45ab-b8d4-dc4e6cf70a05/35324857111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3be40aa-5380-439b-9abd-4298e6ac827e/0_dark_30_full_movie_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1374/0967/files/wuwerebazusivixati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6042/8452/files/20555758306.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 5300 bytes
SHA-256: 7908ac7f12890cf663504d237ef7e4d54c0dcf85a9261a73a75b76a18da9b469
font_01_sfnt_off000073ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 11304 bytes
SHA-256: bd12771e499374f40bf1ca219cdb2f4ff88ce843501727afb8d8e819bc367b28

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