Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec3732a90fdeca3…

MALICIOUS

PDF

38.6 KB Created: 2020-08-26 23:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80233de380d48d92b883c352010a3bb7 SHA-1: daa8f6a058d19732edce7f7785bbb5442021e0fa SHA-256: fec3732a90fdeca30827a68949514183ce51a9faeb00c414067343fa2299f6a8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass of external links, with one prominent link leading to a known malicious redirector. The document body text, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting a lure for users to download content. The presence of numerous Shopify-hosted PDF links, combined with the malicious redirector, indicates a link farm or SEO poisoning tactic to distribute malicious content.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=ethir+neechal+songs+download+starmusiq
    • http://files.wolfememorials.com/uploads/1/3/1/0/131070792/539a6ee56.pdf
    • http://files.familylavisse.com/uploads/1/3/0/7/130776451/gutapemaroz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/bepaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/viwabisizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/support_de_cours_excel_2020_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/ching_building_construction_illustrated.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/centropomus_nigrescens.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/58075033720.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6513/files/62052000545.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4165/files/roland_aerophone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2518/files/concentric_reducer_vs_eccentric_reducer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/kilula.pdf
    • https://cdn.shopify.com/s/files/1/0462/7061/1613/files/disasebiboked.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/doheny_state_beach_surf_report_tomorrow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/laligitekuta.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000582d.bin
4422ef62a278ae7a22246a9bc2626283288f66c0def3922e0ba4624ada299d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582D 5528 bytes
font_01_sfnt_off00006ac8.bin
8ec8450912e110a3b5745a24415633640efcb0eae2d70459355274575341262f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 10072 bytes

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