Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41e5382598ddb87…

MALICIOUS

PDF

44.8 KB Created: 2020-10-31 00:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 39be19c8aeb3cb7026636d8beb601a69 SHA-1: a04cf605b88652b45f43aafd3fca18c392c48f98 SHA-256: b41e5382598ddb87c073a4c5b9931deb757b31b0a783699bbe969582a099fc89
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=stamina+inmotion+elliptical+trainer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5f9176afd4641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f884ab6ae070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8a5b5e4d9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_5f962787aa303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f96624fe4fed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f9a20b87ea1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f8ed806210dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/17383539411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6352/3528/files/tafoxogifuwuvinefukara.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/convert_file_to_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/17623803952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2684/0738/files/8682356375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5768/7959/files/lionhart_ten_tires_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/iheartradio_premium_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9599/3754/files/reddy_heater_170t_parts_manual.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_off000070c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 5004 bytes
SHA-256: 167de2acdb0e0e6f4632299267e504b8b043911bf06f10d6162ec9b25dfd2407
font_01_sfnt_off000081b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B6 10768 bytes
SHA-256: 3e9e9973cbbcd248523cca538ff2f2c68c0bd62daee0dafaa811f5986a31f5c7