Malicious PDF — malware analysis report

Static analysis result for SHA-256 03479ce0930b5e0c…

MALICIOUS

PDF

47.0 KB Created: 2020-09-05 03:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbab612085d7dd41a34930fbe6a6eb36 SHA-1: 48267e5eb820ba55d039c10c1d4ce8400cffeefd SHA-256: 03479ce0930b5e0c1f002a396dcfc6f60e181f2e7911fba133f0f9eddf477187
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=tencent+emulator+for+2gb+ram+pc'. This URL is presented within the document body, disguised as a search result for software. The presence of a large number of external PDF links, many pointing to benign Shopify URLs, suggests a link farm designed to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=tencent+emulator+for+2gb+ram+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/introduction_to_networks_lab_manual_cisco.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/mixobupalotum.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/donadazukajetoruxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9062/4158/files/wekaxidetivikuguko.pdf
    • https://static.usrfiles.com/ugd/dc98cc_b946586ccbd64d09ba2ade6dc72c18f8.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9755/files/mekawetefes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/carry_on_maratha_movies_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/canon_eos_utility_7d_mac.pdf
    • https://static.usrfiles.com/ugd/bc0d1e_b2c0dfe3be6643e5bd8c0eef670002b9.pdf
    • https://static.usrfiles.com/ugd/d51d36_353830a23f764f83b018e1c6a55bcb66.pdf
    • https://static.usrfiles.com/ugd/99a8f2_5798d4360cfa45b4a899e175ee9d18b0.pdf
    • https://static.usrfiles.com/ugd/b27199_c76e38da9a7945339bb54e663bf53932.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f19.bin
bf221b5d02ccc03f2e684ae9d312219e586925b5c84708ef22a174d6e6993231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F19 5380 bytes
font_01_sfnt_off0000814c.bin
161c3714e592dcce582c42e099e6b5ea66955031a2744d76d1c98d8655006e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814C 2528 bytes
font_02_sfnt_off00008c7c.bin
c891b16c58a6250ff3666f25fcc58bb24e27d7949bf59c1fe14247db6e71d364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7C 9924 bytes

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