Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e26199ca3773f33…

MALICIOUS

PDF

38.5 KB Created: 2020-08-22 17:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae0a84aadbffb17ac4572751b87f3f1c SHA-1: c6bc9ea8d77fc822f63745b07acf9371bd9f5a5c SHA-256: 1e26199ca3773f3338082f494dd0a3ebf8eb7d40e61499ea54e8c600e5157475
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to an 'Aicpa peer review program manual 2016'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious IOC is the ttraff.com redirector, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=aicpa+peer+review+program+manual+2016
    • http://navene.oraclereadings.com/uploads/1/3/1/8/131856887/14a26a2d5.pdf
    • http://files.rhetinfo.com/uploads/1/3/0/9/130969298/boxom.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/14918865732.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/tedituro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6140/files/gijapafubomef.pdf
    • https://cdn.shopify.com/s/files/1/0438/9735/6443/files/pascal_triangle_scala.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/google_assistant_launcher_apk_for_lollipop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9504/files/39038154697.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/95390109890.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/jozudakimota.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/zikebokebu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/22323962797.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/55811515865.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/gesubiwibusid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/trastorno_de_angustia_sin_agorafobia.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_off00005696.bin
145daa6006d7eccb5207196e7ebd764256988f4ddf5fd58b5c4040adc722cc7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5696 5696 bytes
font_01_sfnt_off000069fa.bin
ae4950d724d6e16436a07e030de562e05b11c1b9cab6b462a7ca2a3e4baf8258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 10256 bytes

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