Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb75c8502a13b97…

MALICIOUS

PDF

42.0 KB Created: 2020-08-16 19:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a90533c252d02871dba36440ef846c21 SHA-1: 031d20c79c872397585a47c7e8daba6f3257223c SHA-256: 1cb75c8502a13b97aeb8616772cc276a715acb47f02011d0af1eff827923095a
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with text related to 'movies to apple tv', aiming to trick users into clicking it. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML_NYX_PDF_MALICIOUS model strongly supports the malicious classification. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources.

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.com/pify?keyword=movies+to+apple+tv
    • http://files.edgelandscapeandmaintenance.com/uploads/1/3/1/1/131163976/vajemokuwezupow-direnizufal-judilonuxefu-lumijijubi.pdf
    • http://files.specsalesinc.com/uploads/1/3/1/6/131606368/lozozeb-soburizajowif-vufugigemox.pdf
    • http://files.francescabudesheim.com/uploads/1/3/0/8/130874110/2cc64c0f3c1.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/4946166765.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/70902648051.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/votolipuxizod.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/94271031876.pdf
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/tb_meningitis_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/konasufiravexixeseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/nick_jonas_jealous_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/93585390192.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/xidisidiwijirole.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_off00006904.bin
ae099c123e477c418a1dd387aa2649b6b31742cacbe6e34e3bc56c67049c22f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6904 4780 bytes
font_01_sfnt_off0000796a.bin
cdfcbc261a4e4e22f61a2c968a6707ff338bc00e5bc7201b7f089dd5a2f6ac24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 10048 bytes

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