Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ca8c288260d246…

MALICIOUS

PDF

36.3 KB Created: 2020-08-24 22:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12e4db68385d46558c7cc65da3cfcb4 SHA-1: fc731f9b98a6fe43d2f4b3710d948f6e2c91986a SHA-256: d6ca8c288260d246cf05d96c493ad23832d5e184983696a39fa75c66d9d597fa
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to 'gift certificate template' and includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to obscure the true malicious destination.

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.ru/pify?keyword=gift+certificate+template+for+massage+therapy
    • http://nujefog.travelwithkara.com/uploads/1/3/1/0/131069934/6216641.pdf
    • http://files.brandycreekfamilycounseling.com/uploads/1/3/0/8/130813846/014e9316570.pdf
    • http://files.azvrha.com/uploads/1/3/2/6/132681304/donuviguxize-runokaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9121/2950/files/golf_swing_application_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/detalosanop.pdf
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/furanezutuvefiderapeted.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/minecraft_rpg_servers_with_classes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/75766956221.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/nezepigu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/bloodline_1979_film.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/72100698504.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/duzedowifidagujabovubifam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/71743516266.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_off00005057.bin
99cc9e32423c3a8f67417b8c0bc4c2edf5ff2bfdf79e74530f08edffd21c75e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5057 5560 bytes
font_01_sfnt_off00006325.bin
a7c9eae8e04ebe0024cbb8cc6b998d96e936ee34233e3025e7bfb2facc87d36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 9676 bytes

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