Malicious PDF — malware analysis report

Static analysis result for SHA-256 e273da36b884372a…

MALICIOUS

PDF

45.2 KB Created: 2020-10-08 04:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8d12a8912f1d4eb7989864a1690d81b5 SHA-1: 79b9939a76ce8cfc110f29e3aa4116d2fe934915 SHA-256: e273da36b884372a64c49c68ae20b2ee1b005ca4861d711aa8442156157733d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that point to a known malicious redirector, disguised with text related to a book title. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is likely used to lead the user to a malicious site or download further malware.

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://ttraff.club/pify?keyword=a+new+guide+to+rational+living+albert+ellis+pdf In 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/7f4274b5-dd9d-4e4d-93b8-a9f8cce8ecf5/57202101869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c847c44e-6d53-4b4f-83b7-90409d5d7d9a/91757420213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9a6086-6cf2-4a88-8baf-551d7362d2fa/gadodajixodimutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943d6c9a-0ce7-4ee0-942e-244253a0a647/17552265155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8670/3511/files/recipe_book_cover_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8984/6168/files/66383405434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/murenozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/16931898159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6761/5648/files/beautiful_player_christina_lauren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8628/7519/files/68539550960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/arlo_pro_2_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/43355269737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3742265b-e729-430a-b9a0-24f1cf937539/pugavejatumowuzivexowiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6621068e-6540-4b97-bdde-3491da6023c4/19801085550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e299bc8-65c3-459d-88d9-22f1525c2c57/zukovidolowigilewelof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29354f99-3828-459c-9bfe-df69c5817885/90435401623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef943ab3-8676-4df0-9cc0-9eec34a4708d/kibulimurazudowijefot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6377 5372 bytes
SHA-256: 10000e2a2b8cf0df5198e7dd902a2f97d837ec7fdf6a3118e67a9f4be6c4b493
font_01_sfnt_off000075d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 10340 bytes
SHA-256: 8b5c04f253adbc5ad8a68b0f55482d7fb81aeb019da730658a143691f5f09661
font_02_sfnt_off000098d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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