Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab40424b74b2c2d6…

MALICIOUS

PDF

40.7 KB Created: 2020-10-29 20:26:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3d98a915b145b590e84288e53dfe4a SHA-1: 4800f8b6b07fc77aec0c07a0a70fe4c2057d7013 SHA-256: ab40424b74b2c2d6dcfe380203c7c5d614f2a132df8780021733830ca1e8f602
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.ru/123?keyword=discussion+lab+report+chemistry+matriculation+experiment+1', is presented within content that mimics a lab report, suggesting a social engineering lure. While no scripts were explicitly extracted, the PDF structure and the presence of malicious links indicate an attempt to redirect the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=discussion+lab+report+chemistry+matriculation+experiment+1
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87067ed3b21.pdf
    • https://kejedavozeve.weebly.com/uploads/1/3/1/4/131483662/zegowatagipux_funofarafufob.pdf
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/kerij_bumozagawavaja_mojuj.pdf
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8ca4681abc4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/liwafo/tezilifi.pdf
    • https://s3.amazonaws.com/potevip/malayalam_movies_online_watch_free_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/hyosung_atm_7600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7178/1526/files/b.pharm_3rd_year_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0502/6335/9641/files/35256613990.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_off00005f46.bin
8905130b018c885a3c44bf43f9ff3e86d196c0e02500175b4a5e4f20c6580fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F46 5536 bytes
font_01_sfnt_off00007201.bin
18b6a90fa6dfe5b19ae1a8902ba8e7038f0c47379eb210f79eb094070540367e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 10552 bytes

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