Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ddf52ba076aa36…

MALICIOUS

PDF

54.5 KB Created: 2020-10-25 04:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b30042c94d07cce0ea168613b5757cdb SHA-1: 2af25dfed3c84b31fd814c6a150bc65ad4ad17ba SHA-256: c6ddf52ba076aa36d48c381b644c6ae1fc3fde48bc16a559dc1d19c056629269
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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://gettraff.ru/123?keyword=magistrates+court+sentencing+guidelines+drugs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5f8ebd5d3401c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8cb1163aad7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d1c042bb-21c6-4831-bdc6-619c8bfd27fd/juropumaruxuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e280cb46-2c40-4869-a011-126e5467a396/36053533109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d45ffc-fdb2-4b44-924c-7e8753ba54bd/fidoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173f3d61-d66f-4867-b14e-55668ac5b9b5/jiturawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5149892-6f22-40b4-8c0e-0966e5aa8caa/wagiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5255/6184/files/sasibafakasij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/wulekamukof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5465/1294/files/22098568787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0879/4013/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/google_forms_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2286/6837/files/70728613840.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/bdnf_and_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/gukumofi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/majusizasurale.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/pimeruvenozexepevemozanot.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/21712820724.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/33598062325.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 4996 bytes
SHA-256: 4300b4b4969244862ad15fe6cc846c11ef65d00406cbd653f1f403d8ac480935
font_01_sfnt_off00007f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F22 10536 bytes
SHA-256: 6bd55b3ef8db99b36c7462e4740293c17f14abcebfda3851aba7dbeb7c92da65
font_02_sfnt_off0000a2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E7 18060 bytes
SHA-256: 7034e264c7e19fc803877d9083e06d186c006dbf1f97e90f0f76e61d9904371a
font_03_sfnt_off0000be30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE30 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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