Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6d7c9836c02fa9…

MALICIOUS

PDF

51.5 KB Created: 2020-08-06 17:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e261ac95a7c0d8f41d4cff7bba3a00 SHA-1: c12a72fcd4042e744765562a95f0827f83d54ebd SHA-256: cb6d7c9836c02fa942114598bcb698cee0207d5778fe97a7678e871d77cfd286
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This indicates the primary purpose is to redirect the user to a malicious site, likely for phishing or malware distribution.

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.cc/pify?keyword=definition+of+social+media+pdf
    • http://files.integrated-health.net/uploads/1/3/1/4/131438464/91c3620cc9b2d.pdf
    • http://files.madewithloverldesigns.com/uploads/1/3/0/7/130739517/sinarosum_sezipajuzox_kimekazitubus.pdf
    • http://files.myneighborhoodpt.com/uploads/1/3/2/6/132683330/jonin-lipudim-guvobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/32573204069.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/34442581771.pdf
    • https://cdn.shopify.com/s/files/1/0438/1402/7421/files/suxuwovamavetepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/office_depot_1099_forms.pdf
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/holt_physical_science_textbook_teacher_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/dezudepapoximeteti.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/506_assignment_answer_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/19379786183.pdf
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/xekivirejixemena.pdf
    • https://cdn.shopify.com/s/files/1/0438/5544/6176/files/strategic_management_accounting_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/42842493364.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/
    • https://cdn.shopify.com/s/files/1/0438/5544/6176/files/strategic_management_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b4d.bin
d8cdd916d42511a76d6d0a3c35e1f92ece764fc796d90f39b3018dd1d68ba223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 5204 bytes
font_01_sfnt_off00009d04.bin
79dbf644b3e6b05ed449eb6da90bc81a9b0ba9aba11bd531a8055369bf376678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D04 10504 bytes

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