Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c70c5d1196a3f8c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 07:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7f08f8cbc7fb40f6a56136bc918642d SHA-1: 5e064201cd4e7e3bed1b1c20de78e8cfbff0553d SHA-256: 5c70c5d1196a3f8cecadaad36962609fde9b45bcd3dbc0202d2e2108b256ceac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com', suggesting a phishing or malicious content delivery attempt. The document body, though heavily obfuscated, contains the text 'kdigo guidelines pdf' and the malicious URL, indicating a lure to disguise the malicious intent. The presence of a link farm further supports the malicious nature of the document.

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.com/pify?keyword=kdigo+guidelines+pdf
    • http://files.msjacksonsclass.com/uploads/1/3/1/4/131437941/kuwawixifob.pdf
    • http://lovitavi.sandralamouche.com/uploads/1/3/2/6/132681670/b569b8.pdf
    • http://files.joyfuljourneydoula.com/uploads/1/3/0/7/130775633/2d1bfec0.pdf
    • http://gejuwoxe.saclegalprep.com/uploads/1/3/2/7/132712237/buridulof-nofusavuselazi-fetimowas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/1377487786.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/bioreactor_landfill.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3811/files/12861824506.pdf
    • https://cdn.shopify.com/s/files/1/0447/5407/5799/files/android_textview_auto_height.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/60463232708.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/xakowexoguwufop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/sowibaponepuzigesaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/4_addends_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/bts_song_boy_with_luv_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0448/9363/4727/files/tratamento_aneurisma_cerebral.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6581/files/36075722130.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/76578860880.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006223.bin
6303af951615eafc9e9683b00734e47c4fb15052cc678373141e8a11d4db83c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 4872 bytes
font_01_sfnt_off000072da.bin
e2a6212b1a7b30d2626f0226798d7530d64e31a5a3df08fb95663eb9f5ef4b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DA 9876 bytes

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