Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7f33084ac7158d…

MALICIOUS

PDF

245.2 KB Created: 2020-08-18 16:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22f3f4616c7717f821a1c38aca072429 SHA-1: 21d09b49c61c1e79eda6d60081189b6fa41a6e2e SHA-256: ff7f33084ac7158d1bbdc9720999024b21687f11acad6ac233173d0d73e13225
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a course document. This indicates a phishing attempt to redirect the user to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=cours+urbanisme+et+am%25C3%25A9nagement+du+territoire+pdf
    • http://files.poisonivy-designs.com/uploads/1/3/0/7/130775998/bc34d9c.pdf
    • http://files.xavierlecouturiermusic.com/uploads/1/3/1/4/131452817/papet.pdf
    • http://files.rotarycairnstrinity.com/uploads/1/3/2/6/132683330/8006478.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/67504190703.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/66789547064.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4614/files/rotew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/450418234.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/fingerprint_sensor_r307_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/7402/5640/files/classroom_language_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7300/files/93508117877.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/gerofevisuvedijipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/tokilafezuroguk.pdf
    • https://cdn.shopify.com/s/files/1/0439/9408/7582/files/69556197048.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/lotalopumulevufeloniwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/windows_10_upgrade_advisor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/new_telugu_movies_2019_video_songs.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_off000388a4.bin
12781e3e58d90c66743c56e518d7d8373858846e35ace8a60e4fcde72a6c42a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x388A4 5516 bytes
font_01_sfnt_off00039b04.bin
030ed6f0cc139a532eede0829fae3fe5203b82c76c0f20e5cc434cbc2e8233ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39B04 13376 bytes

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