Malicious PDF — malware analysis report

Static analysis result for SHA-256 6555866ed332839c…

MALICIOUS

PDF

40.2 KB Created: 2020-09-01 06:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d94c77f1c84ff81e1ad4fbab0360e5cd SHA-1: 66cbabde795ac9162f6e132b464eb79b91d154e5 SHA-256: 6555866ed332839c80f3a39fc4cc61ead15b41f6ce6fa0c3069a8efa66399cac
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/pify?keyword=alcatel+one+touch+fierce+2+firmware In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5ef510d21cea40feb2e98415b686354f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ca9b0a_04db0fabe7f1416eb358fd625d10d639.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/80c1db_c19cf269344348e481d1437c53157195.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_78b162e72da3437086b193559b6a6bf9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f4de5e_b5f1d5336cf641f3946d9d71e88d9ab1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0120/0288/files/mufasogulu.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f7357_3fb4c35326eb4265b74d30ae7603cd56.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a474dd_e5e40cf723ca4013add635f178666793.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1eb702da17994c0290abf58c1edf473f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f46b5_96e94bbab52849fb9a8d2680cd8ce20c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/67e251_bb00485514f1426d896c8170bb402c39.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6260fe_dfeb2bc49be74604b771d0f33f0164a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce0e6d_f769f2f34b7e40d5882e5a30e3f3bfd0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/191a6d_0003e65bc69246ca91a2ab8db30890e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b77b08_ff3fc16e088b421c840e7a61573a2c9b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b9728_8d2abb3f28b0425da0d7ffc398aac33c.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_off00005f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 5156 bytes
SHA-256: 72c5551aa9a9976fcaebd9c7b62c66c92db816b9420a732a55a07181ed407e40
font_01_sfnt_off000070e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 10280 bytes
SHA-256: 75bd2059fa29cbaa95b6b8b9eef7b6725f825527de731c208d9cabeedad92808

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