Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a9e319e9dc73d1…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 13:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dba4bbdfc28eb3d8a961e53f8323771 SHA-1: 5de5671e13ce7f620a783240d32516dfa8fb59ba SHA-256: b4a9e319e9dc73d15c5e34457e4b5b4ef26a9d220dbaa0bbaa0632e7e0074e65
120 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 'ttraff.me'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to Shopify domains, suggesting an attempt to obscure the malicious destination. The document body, though heavily garbled, contains the same suspicious URL. The primary intent appears to be redirecting the user to malicious content.

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.me/wix?keyword=ng%25C6%25B0%25E1%25BB%259Di+v%25E1%25BB%25A3+quy+h%25C3%25A0ng+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musuvagexas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0408/files/kubuwokubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/rulolewumelinur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/76728004850.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/jolajezekozudorizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/97755247683.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/15534706038.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/naselunedazefekavo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7736/1824/files/backup_and_restore_android_google_account.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/16252977434.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/37873370868.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/fuzalaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1623/files/rufewigiwaxoges.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/jidovolavezulijobosevera.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/46222841434.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/cvent_event_management_platform.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_off00006425.bin
e2ba129ed939ceefac5bca35de8a7a1c3a081f1a69f60d003441201a143688a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 5732 bytes
font_01_sfnt_off0000771f.bin
ab23cf16472dadefc3866e2c0dc192c7f1ad5cdfdcb8514fc53bc3f64eddb411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 21748 bytes

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