Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b96e324346c877c…

MALICIOUS

PDF

53.7 KB Created: 2020-11-03 16:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 33906699b47d367844cb092460e076af SHA-1: 957ece5095eb316624e458c4c227c4937ae36780 SHA-256: 5b96e324346c877cad30d914fa62a984b68b312b6644d05c4f8f6e9f3680485d
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=clipart+child+writing+a+letter In PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/4b78e02fcdea11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5f9d171a76abf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f9e5a952c43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_5f9b0ad485275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f9ce3197f0fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f9c88e19a61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f9041350db6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5fa103cf7817f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/memory_palace_cissp.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/bls_course_aha.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/effect_of_aneuploidy_on_phenotype_in_plants.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000877c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 4952 bytes
SHA-256: 05d9476430bb669e5911c0e51ecc8bba69b39019a6aa84c44806d20f518ca998
font_01_sfnt_off00009850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9850 10432 bytes
SHA-256: fe77e18aff090c75e55c0b594dab2f1a16a0ec3bc24829d9b1ebe239ad245854
font_02_sfnt_off0000bbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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