Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23c241cd67b214c…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 05:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d33d27c4848985d060e1483b4e2d57 SHA-1: 973e5c6ac441b554e371bf724a04bd69de39935f SHA-256: d23c241cd67b214c736099e6f7e20ba92ae3f5040bd3226f18941629328f8c3f
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=kill+an+innocent+in+anvil'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain the redirector URL and other Shopify links, suggesting a lure to external malicious content.

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=kill+an+innocent+in+anvil
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/85209567007.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/48740973560.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/gigizigubev.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/microsoft_natural_ergonomic_keyboard_4000_driver.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/digomabatazedukak.pdf
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/kiedy_android_9_na_lg_g6.pdf
    • https://cdn.shopify.com/s/files/1/0434/4928/6817/files/fara_jaca_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/letijetapesevukotuwal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4678/files/segment_routing.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/adobe_creative_cloud_suite_trial.pdf
    • https://static.usrfiles.com/ugd/06497e_04798d79f3964b2bbce5654fb962a32b.pdf
    • https://static.usrfiles.com/ugd/b58d21_740e86c2f7f041b49ee208eeafcb078c.pdf
    • https://static.usrfiles.com/ugd/e2f197_ae6e796ef8c24892973914379c200648.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006848.bin
e921b49cd0313cd41775516e817b48ed6581f601f071eaba834f384581a68d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6848 4468 bytes
font_01_sfnt_off000077da.bin
6ca13b1f8dd6377c344e23a11369694f38e89784cc17e109abfde508ec2a7148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 4548 bytes
font_02_sfnt_off00008768.bin
6c027002872085bff061f53abdd14343c1ffbf8f3d745568e26695d19ec049b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8768 13492 bytes

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