Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1b0db680e3e202…

MALICIOUS

PDF

45.7 KB Created: 2020-08-08 20:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2f245941358b146ae763c8d656b0067 SHA-1: 595809278091c880789def1a9afa173b4e3b7f23 SHA-256: 4a1b0db680e3e2022b74f5f1dc0fd24b4f1650cc1c2230bb3ce52e44c1712317
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure related to a 'Chili's 2 for 20 menu pdf' and embeds a link that redirects to malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a link farm used for SEO poisoning or traffic generation. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent.

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.com/wb?keyword=chili
    • http://files.thejazzowl.com/uploads/1/3/2/7/132740778/809e8.pdf
    • http://files.mortonbaptistchurch.com/uploads/1/3/1/8/131871568/1040026.pdf
    • http://files.carrshieldcampingbarn.co.uk/uploads/1/3/1/8/131871874/javumit_jefabagew_pufamirimotipem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/32400155752.pdf
    • https://cdn.shopify.com/s/files/1/0433/9036/9959/files/chrome_viewer_hide_toolbar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/potitejuvuluvupedunudegus.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/asmaul_husna_khassida.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/95394039710.pdf
    • https://cdn.shopify.com/s/files/1/0434/8542/9917/files/74519278501.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/noxogonewir.pdf
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/nitukufijab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/bread_recipes_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/sotokedigefere.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/37592081514.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/70446339403.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/56623135406.pdf
    • https://cdn.shopify.com/s/files/1/0436/0237/8915/files/kixojosubu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000740b.bin
3e8ebe5e41159ef05277524c3f4fb381b781e0465b75beb9c2736c911a0884f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 5284 bytes
font_01_sfnt_off000085de.bin
d5e5d7936e378d6f995b63b3e82a94194471753aa9aed5bf7d899f7cf6cdc52e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DE 10436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.