Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e241d69386190d0…

MALICIOUS

PDF

44.6 KB Created: 2020-10-10 18:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a30562e6e2bd45a530b5a74711311a15 SHA-1: 24c1e22b02ddc3d0224c267a06cb4404c4143faf SHA-256: 6e241d69386190d0dd6533b7d0057817e32d435be9ffe1b7a77728daf201afd7
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.ru/pify?keyword=running+on+empty+overcome+your+childhood+emotional+neglect+ebook In PDF document text
    • http://files.worshipandhymns.com/uploads/1/3/1/3/131382491/vipudiwaxab.pdfIn PDF document text
    • http://files.chrisfluck.net/uploads/1/3/0/7/130739343/tazexuzuroloxekil.pdfIn PDF document text
    • https://site-1040670.mozfiles.com/files/1040670/72386474044.pdfIn PDF document text
    • https://site-1041405.mozfiles.com/files/1041405/3557674569.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/67858128891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3514660-8b2e-4b4f-9d84-261abee4acdb/mewetiselaguposuvebipapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf9cde8-4a5e-442b-b776-965cbd5f21f7/jovujotada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0952025-a803-44c5-8b77-25d2bf8346e0/tonozeniwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412f0dad-b035-4ec6-aded-6f56fc634eaf/guweraxezijalisab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6f0ef3-1367-43ad-9662-cf5ba05de8e5/wojatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1840/6048/files/duxeletufidob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/90399354950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8890/6902/files/el_conde_de_montecristo_en_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0833/8331/files/mesujinezak.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_off00006f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 5680 bytes
SHA-256: f652e2b2fe1b848614bc11c38855ce83e72c37aa4ade5044904fe4288ef2c881
font_01_sfnt_off0000829b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829B 10128 bytes
SHA-256: 8f430d63191b0dc95d62d0fc6074e39b79820a738b39bb0f10832031d54f83e7

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