Malicious PDF — malware analysis report

Static analysis result for SHA-256 de07d5ffe6df8e0b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 14:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54517f40c50fa55e62cd1cd5561f59a6 SHA-1: 624807ccb5360f1f869624539b9f2bb6e229d1a9 SHA-256: de07d5ffe6df8e0b6227650958396cb2cf8eb82c83461a696f3a976d839fd4ec
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=marked+crosswalk+guidelines', points to a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to external content. The primary attack pattern appears to be directing users to malicious infrastructure via a link farm.

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.cc/pify?keyword=marked+crosswalk+guidelines
    • http://kevoga.libertoonian.com/uploads/1/3/0/8/130874493/jajifipolo.pdf
    • http://files.packmeinursuitcase.com/uploads/1/3/0/8/130814355/1181197.pdf
    • http://rufep.mroczekmusic.com/uploads/1/3/2/8/132814930/98621b0b345417.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/toweta.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/aldose_vs_ketose.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/types_of_acquired_immunity.pdf
    • https://cdn.shopify.com/s/files/1/0440/0162/4214/files/mokubaka.pdf
    • https://cdn.shopify.com/s/files/1/0455/7661/8149/files/pdf_file_convert_to_powerpoint.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/76311042992.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/github_permission_denied_publickey.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5096/files/69000370480.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/64817213815.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/gorewujiburazijasasi.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_off000067c2.bin
8750a194e7244d492c6a6bd370dd4870667dfc651fd5e4fdd82dc17c622fefc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C2 5268 bytes
font_01_sfnt_off000079d0.bin
8e6c9ff9e5d7f0d4959ebb5dbe165068e226137babf4b1a850f3c70db1aafd8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 10296 bytes

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