Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c637e6cae555d4…

MALICIOUS

PDF

38.3 KB Created: 2020-07-31 12:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 733bb46e5274d0211e7f16f6ca9f31ba SHA-1: 9f4c210572b576ac7929d7a96e0e74e3bfc96212 SHA-256: 23c637e6cae555d46dfd91ee83083872e69e469970e151fd8949cbc9d9af2bbe
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be related to 'Cracking the sat physics subject test 16th edition pdf', suggesting a lure. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further 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=cracking+the+sat+physics+subject+test+16th+edition+pdf
    • http://files.lifepsych.com/uploads/1/3/1/3/131398221/namukuvutozu.pdf
    • http://files.sbmcwilliams.com/uploads/1/3/1/4/131406412/16a279be.pdf
    • http://files.pe4d.com/uploads/1/3/1/8/131871745/3351726.pdf
    • http://files.pvd.tech/uploads/1/3/1/4/131407102/954549bac777.pdf
    • http://files.pvd.tech/uploads/1/3/1/4/131407102/954549bac7
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/68336753267.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/disowuwavilanivow.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/61062819395.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/76782461708.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/podajaxigukadomix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/nixuke.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/31954290897.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/mofaware.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/bukogoxewokupi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/zulezeregijurugigosufat.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/71721988180.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/fowikebepexazetedelunala.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_off00005660.bin
980aa1f007b089ba320230c042d49d17be907bc736d6d70fec6c09fa3a658e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5660 5880 bytes
font_01_sfnt_off00006a62.bin
06147ac849cbe51dbdc9bbe1fb4e3a573859a4a5125a9dfeaab25fce68c5af05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A62 9696 bytes

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