Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a49836fc7b8da3d…

MALICIOUS

PDF

39.9 KB Created: 2020-08-18 13:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f5fe36c57dc2684fe146347a7c95960 SHA-1: f303b20bce03c29c8045d688933817886d973b6c SHA-256: 1a49836fc7b8da3dc81872c47be7be8f59be1f65d205734ac248d759a1a6b489
92 Risk Score

Malware Insights

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

The PDF file contains an embedded link to a known malicious redirector, ttraff.cc. This redirector is likely used to funnel victims to a phishing page or a malware download site. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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=definite+and+indefinite+articles+in+spanish+worksheet
    • http://files.joewilkinsonstudio.com/uploads/1/3/1/4/131453436/tusunizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/99901824521.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/maxon_liftgate_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4090/files/79110335356.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/acids_and_bases_grade_12_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2038/files/hello_mudda_hello_fadda.pdf
    • https://cdn.shopify.com/s/files/1/0445/3515/2804/files/siva_manusla_sakthi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/povariganazeni.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_off00005a21.bin
cd9460b65d8392355a80e7a458a2d2eb626567a266062fbd3be1240d1f49511e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A21 5396 bytes
font_01_sfnt_off00006c88.bin
788fcb89825caba69dbb23036b3e81b193f71c311fb53f4e510bbede3b6985b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C88 12036 bytes

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