Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e1a8f1ee50b8ed…

MALICIOUS

PDF

74.4 KB Created: 2020-09-11 19:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e04b9cff460a9ca63566865e67f068b8 SHA-1: f0e1516d4e73ad25b58ef24d6ce84b607bfe3eb5 SHA-256: f8e1a8f1ee50b8ed8cc3828c9376bba6b4662430dde307793cf24b3627aa0b5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=allergic+rhinitis+treatment+guidelines+australia'. This URL is embedded within the document body, suggesting a phishing or social engineering attempt to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.club/wix?keyword=allergic+rhinitis+treatment+guidelines+australia
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/41378394222.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/figojugokisekisemafexokoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/70776694519.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/54832943718.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/python_round_function.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/xumirewomu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/practical_guide_to_abdominal_and_pelvic_mri.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/54793976404.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2773/files/tu_ehsaas_kara_gayi_hai_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0286/files/tuvarisabisigozodewe.pdf
    • https://cdn.shopify.com/s/files/1/0463/6318/1217/files/jacoco-_maven-_plugin_html_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/64244031142.pdf
    • https://cdn.shopify.com/s/files/1/0462/2601/4362/files/request_for_quotation_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/marvel_ultimate_alliance_2_ps3_dlc.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/granado_espada_characters_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/realcomp_mls_login.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e152.bin
f38f17b060d4c4bef548414fe8aae83b5e59113a9f7a7bb18d481f45d59f79ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 5340 bytes
font_01_sfnt_off0000f34f.bin
b620eff9d7ab4efd41d1ebec828a805aeac4cb4eae0a6d1473be61636f9e76d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 12748 bytes

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