Malicious PDF — malware analysis report

Static analysis result for SHA-256 279b6f2d5859e2a3…

MALICIOUS

PDF

49.0 KB Created: 2020-08-31 11:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56c99bd2d9ec7f04dd1c44a281110aed SHA-1: 0349dfc29689995eefc2046f0870b4af1ce20a6d SHA-256: 279b6f2d5859e2a370270ac98db9be248629860a00f26f51e6c653dee6ce0a9e
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=software+para+investigacion+de+opera'. Another heuristic identified a PDF link farm with 26 external links, suggesting an attempt to manipulate search engine results or distribute content across many sites. The document body contains garbled text but includes the same suspicious URL, reinforcing the malicious intent.

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=software+para+investigacion+de+opera
    • https://static.usrfiles.com/ugd/b8c837_f1fb51ce81404a3294fb1828f2d667ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_6269df8c38474704b9020af4bb0b4d61.pdf
    • https://static.usrfiles.com/ugd/70c1f8_8ef9fc2842384617a500130e07f2a015.pdf
    • https://static.usrfiles.com/ugd/b8c837_487fc394f08a44459ad4c0592f0a8814.pdf
    • https://static.usrfiles.com/ugd/b8c837_125cac73373d444b822f3928dbe9a54d.pdf
    • https://static.usrfiles.com/ugd/c6ac46_ae0a8e51e8fa4b0f927607bfc6a344a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/8890115040.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/weight_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigemeziguvego.pdf
    • https://cdn.shopify.com/s/files/1/0440/5575/6965/files/pegepozazavupunebezod.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/2020_calendar_printable_nz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/gerogafofijozil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/76302008853.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_off00007d34.bin
ccf3cab139cf8a2d91bf502229c7248b9b50343138ade0d1155d31254aefc70a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 5548 bytes
font_01_sfnt_off00009039.bin
0b1c0e0ee636c2032ba8c5f3fe8c91bbd114e52134cf800955b94643608d2693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9039 11508 bytes

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