Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a5cb1e274ddf00…

MALICIOUS

PDF

54.6 KB Created: 2020-08-30 04:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c425b82a226c073d26f231ae1b714d08 SHA-1: f8435093e7e14e2b183ff57f21c42fcf5881019c SHA-256: 21a5cb1e274ddf002233e62e66a3c5733ef889202825403b84e5cffbf0a4f0e3
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=macbeth+literature+guide+2011+secondary+solutions
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/juremovevipitizis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7751/files/bactericera_cockerelli.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/behavioral_finance_psychology_decision_making_and_markets.pdf
    • https://cdn.shopify.com/s/files/1/0434/8238/2502/files/75497640347.pdf
    • https://cdn.shopify.com/s/files/1/0436/5798/6201/files/mendeley_web_importer_not_saving.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/dmv_form_mv-_104.pdf
    • https://cdn.shopify.com/s/files/1/0440/5687/1062/files/jimifisivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/vokevarunosonujabileve.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/37412442052.pdf
    • https://cdn.shopify.com/s/files/1/0428/7181/6358/files/bivarogonomexovaruki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7024/2460/files/advanced_potion_making_book_half_blo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/58109782233.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/zanekon.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_off000094e4.bin
ccecb05ee9b3a8868fb5487ec7eeed71d80c85a81b8f5b8c848c058af6514e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E4 5772 bytes
font_01_sfnt_off0000a88d.bin
6df8e48576b5dc2313b00e4960f7d6204413df2fdd94787999fb618209b30e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA88D 10732 bytes

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