Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe9c87289fafc68…

MALICIOUS

PDF

49.9 KB Created: 2020-08-23 12:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b5d8e4db0213c73553038964ff8d285 SHA-1: cd9175adce58cd542781ca08a0eba61488d37246 SHA-256: fbe9c87289fafc68dc483eb2391ee9e61316daaf2fe959003a792b758ebc2c33
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=modern+analytical+techniques+books+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, a heuristic for a PDF link farm was triggered, suggesting the document is part of a larger SEO poisoning or link spam campaign. The embedded URLs, including the redirector and numerous shopify links, are the primary indicators of compromise.

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/pify?keyword=modern+analytical+techniques+books+pdf
    • http://fadanado.gforceunlimited.com/uploads/1/3/2/3/132303410/2592131.pdf
    • http://files.questbestgsds.com/uploads/1/3/0/7/130739454/5f865d697578.pdf
    • http://files.truromass.org/uploads/1/3/1/8/131856247/7500713.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/87219022873.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/dutuluzubowotiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/68049019131.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/zovutokalopebapel.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/klasifikasi_basidiomycota.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/border_officer_0._6.pdf
    • https://cdn.shopify.com/s/files/1/0437/0802/2938/files/44494775499.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/ronoxazavurobebarabisolej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/tiletaxaxopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/vapuvuledamebikovajabazu.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_off00008533.bin
55f6263e9367aa1a4e241f5dac632eaf4f3aa2af3826bf28ab2e57a98bd7bbf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 5680 bytes
font_01_sfnt_off00009885.bin
b95416fde260abc0bfb09967155abeff68e756f84e8a4fe7e6b93b66144ad3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9885 10176 bytes

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