Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0eee88554c94eae…

MALICIOUS

PDF

47.7 KB Created: 2020-08-23 21:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0003c6f116340ec02bbec9b1e62dcce3 SHA-1: 85c108e25d9bad5934cfcb22019b07921bdd5ac3 SHA-256: b0eee88554c94eaea244b50349f4198927aab85c3110dee44ce600cf685ec674
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename. This suggests the primary intent is to trick the user into clicking the malicious link, which then redirects to further malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=electronic+music+circuit+guidebook
    • http://files.sammamishperformingarts.org/uploads/1/3/1/3/131383604/tatamew_tolegapi_pevoxusifajisoj.pdf
    • http://vuxipar.shearwondersboutique.com/uploads/1/3/0/7/130776699/1eee6583493c653.pdf
    • http://files.tikicab.com/uploads/1/3/1/6/131636956/pezomifof_tafafowijup_loxatowivuf.pdf
    • http://files.covertscales.com/uploads/1/3/2/7/132712011/6ce6c6942.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/jagej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/autocad_create_black_and_white.pdf
    • https://cdn.shopify.com/s/files/1/0445/4160/8100/files/ruby_delete_key_from_hash.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/57231355925.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/bifatoruxava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/7439859145.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/sosejetuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/37651707035.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/foditavirezeneda.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_off00007080.bin
3af91b4809c3dc1c318749abb37156a4321dba9d482c113c5892187368e19e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7080 5092 bytes
font_01_sfnt_off000081b1.bin
8c87dc6831ae69d2e59aecf57384b4ce3b587bbcf28fa73f411b475c66db6c48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B1 9936 bytes
font_02_sfnt_off0000a3b0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B0 4324 bytes

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