Malicious PDF — malware analysis report

Static analysis result for SHA-256 255f77f70ebd031e…

MALICIOUS

PDF

67.6 KB Created: 2020-08-02 16:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84826039b7134e584c63256884877876 SHA-1: 02693f8fcab9193b23a68b6bc5622e39fd0c2925 SHA-256: 255f77f70ebd031e7d883e36e6464647d7d23eac8d2ebf1fa2ff98df5b6164bd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector URL (https://ttraff.com/pify?keyword=chanakya+niti+in+english+pdf). The document body, though heavily obfuscated, contains text related to 'Chanakya niti in english pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the malicious redirection attempt.

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=chanakya+niti+in+english+pdf
    • http://files.markmanley.com/uploads/1/3/1/4/131483184/4864934.pdf
    • http://files.healingessentialsmassage.com/uploads/1/3/1/1/131164202/5d858f8f9ca2296.pdf
    • http://files.adachiclinic.org/uploads/1/3/1/4/131408142/dovonataxekibin.pdf
    • http://files.ada
    • https://cdn.shopify.com/s/files/1/0437/1313/4743/files/96346448883.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/28449616381.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/91702301821.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/lepadan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/3953210103.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7603/files/redoratusaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/finutewexaxawapoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/96901449204.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/vazeperuwaxekojubesemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8717/files/56825280744.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/9758768881.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/29516820796.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_off0000cc5a.bin
c4464b9806d67bbba8c26a2d2ca785ae12cfaf48d53b5d6400f57d48f8532a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5A 5276 bytes
font_01_sfnt_off0000de59.bin
16178810ce0a06f4c32a75a54e90b4163d0ec88d1c01ae8c509b79d69c958a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 10192 bytes

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