Malicious PDF — malware analysis report

Static analysis result for SHA-256 8671fdeff546397f…

MALICIOUS

PDF

56.4 KB Created: 2020-08-15 06:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea2833ea25d4e3773d807032fa4407f SHA-1: 3a3c4f653faf0390dc19b1cc183945c0fe417d58 SHA-256: 8671fdeff546397f5a66f3618b57525339267d98948054dc7c2d13cf76c96492
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, indicating an attempt to disguise its malicious nature. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to manipulate search engine results or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=learning+speaking+english+video
    • http://files.ency-education.com/uploads/1/3/1/8/131857445/a6a129f9a90813.pdf
    • http://tiposo.uno-corp-online.com/uploads/1/3/2/8/132814664/tifemux.pdf
    • http://files.kayakanglersofmissouri.com/uploads/1/3/1/0/131070581/a4cacaf1c3.pdf
    • http://wowavoni.creativeforcecoaching.com/uploads/1/3/1/0/131071288/8d9e8201002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/2074189451.pdf
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/university_management_information_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/xaxexoviwikel.pdf
    • https://cdn.shopify.com/s/files/1/0439/4765/5323/files/52878352287.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/78946339505.pdf
    • https://cdn.shopify.com/s/files/1/0436/2102/3904/files/windows_7_configuration_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8765/0211/files/tolopolukurazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/wadedinugobifof.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb5.bin
2eab3a7cc56c646642cd5fe6bfaf1421217d7b0d8837bc886996af8902807224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 4520 bytes
font_01_sfnt_off00007c9c.bin
681297ac11bb837ea5d4da5e23633f6487b01a2d0ef843ebb263b07a8ffd82bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9C 4992 bytes
font_02_sfnt_off00008d84.bin
dd53f71d5e882b29a25a642056dfdecbfcc04aa418552c5d3fdbfa6bb46016cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D84 10024 bytes
font_03_sfnt_off0000b008.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB008 16164 bytes
font_04_sfnt_off0000c51d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC51D 4324 bytes

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