Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd21ddcb07062e5…

MALICIOUS

PDF

44.1 KB Created: 2020-09-02 23:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdae6d1a2544db7d42266fa2d24991f6 SHA-1: 348d49863886814f3b646eb2595fb6152078577b SHA-256: 0fd21ddcb07062e59a5617ab884b98030b86fe735b2ebf4aeb5a0229899a51fa
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous links and the malicious redirector point towards an attempt to lure users to malicious sites or distribute further payloads.

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.me/wix?keyword=cahiers+du+cinema+english+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/zitobatuxamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6572/files/xasutosatajopepela.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6299/files/25806402599.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/telugu_stories_in_format_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0464/7596/8662/files/cisco_nexus_5672up_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0465/1519/1958/files/christmas_choreography_videos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/nakatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/62631508181.pdf
    • https://cdn.shopify.com/s/files/1/0434/1622/3906/files/transunion_request_for_free_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0457/4612/7004/files/lujewalosojipajer.pdf
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/xamidifozimulepora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66491839223.pdf
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/soda_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/olive_garden_catering_menu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1869/1239/files/common_questions_for_job_interview_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/wow_balance_druid_pve_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006976.bin
d7d9268f3bccc8a7fa109cf56f583e744bd23dedf716c686f54a263ebaa6b79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6976 5476 bytes
font_01_sfnt_off00007beb.bin
f2936c879094ee60f20b69afe656aaba107933a4cb455d66a0cf4bc47bf0bcb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEB 12024 bytes

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