Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecc577ec1f942df…

MALICIOUS

PDF

58.8 KB Created: 2020-10-25 20:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 304931eeba3d8034f8101fb22b349e2f SHA-1: 61919c962fe11f0304bce53f6abf1054ef992154 SHA-256: fecc577ec1f942dfb0f888f683e778609be7ecaaf2130069804a56541bdc468c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=animal+jam+mod+apk+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f8efcc17a579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f8a030c6bccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8e78a7c64a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8a0f29b4755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f877a9373476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_5f94241c9027e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5f916f94425fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8c296e8ceb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5f94be5e48f4f.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/6e1c7a35-5f26-49ef-8bed-bdff49b85e19/gifubusoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be96908-72ba-440b-a4be-aa811f4c010a/65563338745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579dbd9b-8ddf-450a-af72-91ca8eb9e567/74124464472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd2c8bb-5062-4457-83d8-699e398919be/92372457558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb88c059-3d12-4c05-8d2d-9d5064d44bc3/xibelumiloroporimobev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/treatment_guidelines_cushings_syndrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2240/3742/files/83409099982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6573/9930/files/tufokekuduwibijatek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/ipsec_vpn_configuration_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0712/5922/files/how_the_grinch_stole_christmas_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/samsung_tv_remote_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6386/8573/files/download_test_dpc_5.1_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4086/5956/files/extract_table_data_from_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/88686751440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/registers_of_scotland_registration_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ffd438-ad7a-4935-9427-d1056869ceaf/search_for_clues_to_the_keepers_whereabouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46350699-d99a-42f9-9b94-b2e7659e9fc1/wasubunikulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0def04c-7a8a-4c15-a463-df8d611f19cd/63051710364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722666e0-3a27-4280-9755-5004acf734d0/6547051565.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9E 5232 bytes
SHA-256: c2c57ce1b59cb43a6584355618590e1effb5bf20c9a4e161d49ab1e44611c50a
font_01_sfnt_off0000a15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15A 11444 bytes
SHA-256: fc39a6434ca8b205d05afa51920cf7a2040f522796223122fc5c89ff57e67a9f
font_02_sfnt_off0000c80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80C 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073