Malicious PDF — malware analysis report

Static analysis result for SHA-256 be91f0458f8878e3…

MALICIOUS

PDF

42.4 KB Created: 2020-07-28 19:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 476fc3b1879e9622cc564521c3751da9 SHA-1: ec7fb88ea584398386f613d30cc68569a4c86823 SHA-256: be91f0458f8878e3b98447161bb23d6afa37d98b33969cdd2223f4ca5c3ff30f
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'black sabbath font' and includes a call-to-action phrase. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=black+sabbath+font
    • http://files.christiefencing.co.uk/uploads/1/3/0/7/130775441/vexexixeve_wexeruvodusek.pdf
    • http://files.waunakeefeedtheneed.org/uploads/1/3/0/7/130776499/34f62a286e3.pdf
    • http://files.mvcalvarybaptist.org/uploads/1/3/1/6/131606815/wifob-vunajilifa.pdf
    • http://files.aloveleighcreation.ca/uploads/1/3/0/9/130969761/4518906.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/7428425195.pdf
    • https://cdn.shopify.com/s/files/1/0432/8584/0036/files/51476599538.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/roteguloxeruxubo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/nefugepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/jinaxijunokubum.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/62679902692.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/47923049733.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/87166942277.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/vewobisalupolaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0325/files/59813185841.pdf
    • https://cdn.shopify.com/s/files/1/0432/0971/9965/files/vufikene.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/1/0429/6255/0940/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006950.bin
2acca5f7e669c0dc6c69d433296e62bc884a9282816dacda7bff96d2bc830c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6950 4748 bytes
font_01_sfnt_off0000795d.bin
6fb2ecb491fe67232d01bd533e40e3914b65d73dce20005f8237995a79d321f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795D 10412 bytes

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