Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f31a99742d6604…

MALICIOUS

PDF

39.7 KB Created: 2020-08-28 02:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8038b122d68bc91aac0c89c0f3b3bb01 SHA-1: 2be009d949a2629f1699af6288afdf64e3ea50b9 SHA-256: 29f31a99742d6604d0ebfb39546f4889ad4f6a11ffbbd07e12c9c47535e1022c
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Praxis 5354 study guide pdf' and the malicious URL. The heuristic firings indicate the PDF is designed to redirect users to malicious sites, likely as part of a phishing or malware delivery scheme.

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.com/pify?keyword=praxis+5354+study+guide+pdf
    • http://files.krystalsolutions.com/uploads/1/3/1/8/131856162/dolikusitugoj.pdf
    • http://nepaxu.yesindustrialsupply.com/uploads/1/3/0/9/130969280/212746d.pdf
    • https://cdn.shopify.com/s/files/1/0464/1734/6728/files/18586166046.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/food_and_beverage_cost_control_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/o_ambiente_de_trabalho.pdf
    • https://cdn.shopify.com/s/files/1/0428/2079/6583/files/84913222042.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/zejuwasazelij.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/89698172130.pdf
    • https://cdn.shopify.com/s/files/1/0438/9617/6808/files/partes_de_una_zapata_aislada.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/kabary_betsileo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7012/0085/files/english_worksheet_nationalities_and_countries.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/wiwuwumezamuwutuwisejen.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_off00005af3.bin
a2ad7bacb20cdb1906dc8c679f9e3a6520e5bd9ca30c92c5e6d31532fa72cb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF3 5724 bytes
font_01_sfnt_off00006e8a.bin
a44d942a7da37771387b5f56bee6b27f62067e2f0998dce96ce86dfb2c91c5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8A 10484 bytes

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