Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1fa3b6cd448a97…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 11:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 454eb91d1985d9ea0e1940e8c226f5c7 SHA-1: 67bc2b67ba28699a421c897745d4125b5969f7c4 SHA-256: de1fa3b6cd448a97a3273b4fb0d28267935192039825c0fc7ef999657e8290c0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.cc/pify?keyword=arenes+chemistry+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other Shopify-hosted PDF links, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to malicious infrastructure.

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=arenes+chemistry+pdf
    • http://files.sunreihealing.ca/uploads/1/3/0/7/130775752/7211071.pdf
    • https://cdn.shopify.com/s/files/1/0454/4541/5070/files/ancient_china_history.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/16758749760.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/lowaxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0730/9984/files/95414162658.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/chuck_movie_series_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/49923975604.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/freeletics_workouts.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_off000066da.bin
9c0e84ad90debcc610404afbc9907f26d29efed3143ff19cc5f911b53ab3e0f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 4924 bytes
font_01_sfnt_off00007766.bin
980f1200b0240bc3530d6ffb081f14f5c015ff025b8da6bd2e9813cae68d6c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 10008 bytes
font_02_sfnt_off000099a6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A6 4324 bytes

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