Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7478dde54f67f6…

MALICIOUS

PDF

92.0 KB Created: 2020-08-29 23:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70ed8c567947f7d89bf5637f8f9d00df SHA-1: d4415285e98db5c8b6c64339ca491765b49c1180 SHA-256: ec7478dde54f67f62ad2ad0c1f74a2c985a498a55bf983e589c6ea4bec165469
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a known malicious redirector. The primary URL identified, https://ttraff.com/wix?keyword=tabla+de+prefijos+griegos, is flagged as malicious. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a malicious site. No scripts were extracted, and the PDF structure itself does not indicate specific exploit techniques beyond redirection.

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=tabla+de+prefijos+griegos
    • https://static.usrfiles.com/ugd/b8c837_c983ada6ea3d434b894a2931d6bcda20.pdf
    • https://static.usrfiles.com/ugd/b8c837_c501d8fa13944c5da4245ccb5664cdc9.pdf
    • https://static.usrfiles.com/ugd/77d535_16c83bf087ac46b8963c387458089edd.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5f882c6613d40fea5d074ba869034d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_81cd44c899c14a7c92cbe3519735d7ad.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4882/files/69762318276.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/84974356469.pdf
    • https://cdn.shopify.com/s/files/1/0435/4218/4095/files/15999545384.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/denoravabobivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/talulilalubedurine.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/50629329077.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/13522654845.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bijuwosozawubuvenokuzi.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_off00011245.bin
cb919d90249567a6a797f7ff1b36d18de89dff623a8e4983b2cf137f2f9b8ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11245 5376 bytes
font_01_sfnt_off0001249c.bin
8240f3778bdec59d7b88f32595990a5a6ba36da1eb7b4f1b292dcfc3429388a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1249C 22780 bytes

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