Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fde6996c387c6c…

MALICIOUS

PDF

43.1 KB Created: 2020-10-19 07:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: af0755bb1e7f2f6674c0133264a32079 SHA-1: ffdec661b907ca712dfb70554a747f191911d4b5 SHA-256: d3fde6996c387c6cee79f9944a4cde03df992700b51f5c67b8bb670bc16005ab
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=driving+school+simulator+apk+mod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8aa1bcb505c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f89193ea990c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f8ae98dd97b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8262/0309/files/10868701944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/gw2_beetle_mount_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8570/0519/files/2873039029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f377b077-d39c-456c-ae75-8e02919b3834/6500368245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c09ccb-6412-417f-9205-df09d36fe196/tejemakudomowos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55246969-3492-4261-9ec1-5d253bf93e34/35044642582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50beba86-dda0-437f-810e-6ca8be6e6808/74239472527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d702dab2-3e66-4668-87f7-5a926bf5d93a/furipawuxilibusuxopesopep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/a_fall_from_grace_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/jipezidipusekaduzujazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/61228707801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f08ed6b-b938-420d-8257-c86a370bfe06/rinododifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ec4ef1-4e39-449c-b6ec-05dc7ec0c464/berax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5440/2202/files/getting_the_main_idea_worksheet_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2940/8155/files/perijagoxumuferelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4502/2624/files/the_visitor_unblocked_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9366/8255/files/nasokaritip.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_off00006882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 5612 bytes
SHA-256: 4f2456c735f3d204f1b922bca0ebe8f22ae2fd08511d5139373dfffef2466457
font_01_sfnt_off00007b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B70 10444 bytes
SHA-256: 8fe1ec3e98ac2fc8af069c49e2f708b0a6d0508c7f2f71e1359fae1f67c4e69f

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