Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40cd5626e68f23b…

MALICIOUS

PDF

112.8 KB Created: 2020-08-30 07:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aadea556ef0a8ec646785411db6e9758 SHA-1: ecdae5aedbb5e159b7672741f94806ee70e9213e SHA-256: d40cd5626e68f23bd09dfec9f9209f58e814c95414e7163ed78edbceba795ba3
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=Kostenlose+iphone+porno+creampie'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign but likely serve to obscure the malicious one. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/wix?keyword=Kostenlose+iphone+porno+creampie
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/800_thread_count_egyptian_cotton_sheet_set.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/niwosibukure.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/fejijapujurekeso.pdf
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/88481833541.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/completely_uninstall_mysql_mac.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/mh_cet_2020_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/81986667418.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/asiana_airline_crash_news_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/lodafawujijenelidefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/69551237498.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/20641569633.pdf
    • https://static.usrfiles.com/ugd/23b571_b8ad0cba451e47028f7a53642387b06c.pdf
    • https://static.usrfiles.com/ugd/b8c837_18fb4f5e52114b188df1b35651c42c50.pdf
    • https://static.usrfiles.com/ugd/7d21c0_32dcf93bff0d489a921bc56ce22fa8fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9288281e9f6e40dd9760fc43ea6f34b9.pdf
    • https://static.usrfiles.com/ugd/4ae4db_af3e0c6e85ba44f5a09e448415f6fa21.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_off000182e3.bin
b31a1d27f89725db7dcb1bbb2e31141a6c15d9f5c198733c3b073b342f927939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182E3 5144 bytes
font_01_sfnt_off00019430.bin
4e33bf66937ca00595275f90bdb2f77681add9cd658283ad5880ceb1892ec4aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19430 9888 bytes

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