Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c029a83b2b289bb…

MALICIOUS

PDF

41.5 KB Created: 2020-10-02 14:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6a96510c638e28e2b3dfaa8b03763005 SHA-1: e42ee430d588c1156bc07162057383c2cb3ddcbd SHA-256: 0c029a83b2b289bbd8ff2c7fc34396c67d893278b6ec4ef2962869f0739d61e8
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://cctraff.ru/strik?keyword=mystical+manga+tarot+guidebook+pdf', is flagged as malicious. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and embedded links point towards a malicious intent, likely to redirect users to harmful content.

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://cctraff.ru/strik?keyword=mystical+manga+tarot+guidebook+pdf In PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/86515295850.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/tizovogonovinuzopup.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/famulasa.pdfIn PDF document text
    • http://files.islandexperiencevanuatu.com/uploads/1/3/0/7/130776809/7cef54.pdfIn PDF document text
    • http://lidazow.ultimatehomeconcierge.com/uploads/1/3/1/6/131607600/dusorej-mixamuvabapus-vekoputinetulij-lijasogonumope.pdfIn PDF document text
    • http://luwajew.aflskincare.com/uploads/1/3/0/7/130739456/vexij.pdfIn PDF document text
    • http://rologo.contoursandclay.com/uploads/1/3/1/4/131437079/2980815.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/1/0484/5679/4273/files/linomexegime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/kodedefuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/scribbling_stage_of_artistic_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5826/5238/files/993695464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/genuruzumufuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4255/7089/files/tokidizibaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2024/6440/files/major_and_minor_music_chord.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_off00006240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 5784 bytes
SHA-256: 32991dcdc6eba94a0a331a1189bba90d60a6ffd682588a932bd7e8925df32548
font_01_sfnt_off000075ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 10128 bytes
SHA-256: a120a6bb1d619de27a649da82f06f570101d14976e2e0fc67b2395d55d6827bf

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