Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b969e1c6198861b…

MALICIOUS

PDF

44.1 KB Created: 2020-08-24 02:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6874e9e0a50e88e18b65c3af5035ddcf SHA-1: ca87fb61ae16c627f863d0363e5e0717f338bf0f SHA-256: 5b969e1c6198861b0f2bcb7fa42ba17e73e4a59f4496b23b886fe8255067f375
154 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 a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This suggests the document is designed to distribute malicious content or lead users to phishing sites.

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.ru/pify?keyword=after+effects+cs6+tutorials+pdf+for+beginners In PDF document text
    • http://wusibati.qcfamilymartialarts.com/uploads/1/3/1/4/131411150/fumoforu-jamexewufezajuk-jufib.pdfIn PDF document text
    • http://lubimes.excelleratedbusinesssolutions.net/uploads/1/3/0/8/130874359/levanifagezawoginaj.pdfIn PDF document text
    • http://files.g-baldai.lt/uploads/1/3/0/7/130775346/22e7d54533.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/1/0439/3094/3643/files/28970261372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/organizing_machine_learning_projects_project_management_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4072/7463/files/linux_tr_command.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/probability_basic_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/tapupabume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/nazafebuwot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/assistive_technology_for_the_hearing_impaired_deaf_and_deafblind.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/26664946804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2661/0333/files/smoke_brush_for_photoshop_cs3_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/66912216814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/lugopimadegorebolinaleva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/zutavupinebaratuvumozalev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/historia_de_los_anunnaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/fedasinirapuzerijawamu.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_off00006d79.bin
1db4f62bed307ae6ed0fa80f5c97289d37576ea5f2d3e4a61847962bff87d019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D79 5604 bytes
font_01_sfnt_off00008093.bin
c5fd7be44114fd261f5375a93b131cc19b1f3fb65dd98329c1a3c6f1c3a1f0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8093 10048 bytes

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