Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1a1a1a4d0a9430…

MALICIOUS

PDF

48.6 KB Created: 2020-09-02 01:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e537fc284bd406b118fb1cbe4a4a1e0 SHA-1: 4ed536a2fea789d8cdefe40551fe94292b2cece7 SHA-256: 1c1a1a1a4d0a9430992920e794757c47820044f255dce47e2fe29a6e523a639f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a malicious URL, disguised as a resource for 'Java interview questions with answers pdf'. This is a common social engineering tactic to trick users into visiting malicious sites. The PDF structure and embedded links strongly suggest a phishing or redirection attack. No scripts were extracted, limiting the analysis of further payload delivery.

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/wix?keyword=java+interview+questions+with+answers+pdf
    • https://static.usrfiles.com/ugd/4d400c_413e55a8183d4ebda7436fbbf40b490b.pdf
    • https://static.usrfiles.com/ugd/b8c837_16b52d1e7e444b0396e282047c1fca6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_165909e2bd984fe8a5d4d9948cac662a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/18961823576.pdf
    • https://cdn.shopify.com/s/files/1/0470/9430/0830/files/pexalaxagerum.pdf
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/rubber_sheet_for_sale_durban.pdf
    • https://static.usrfiles.com/ugd/8de238_9d4ae883e2204e8fa8737129ea4d4df4.pdf
    • https://static.usrfiles.com/ugd/917232_5a245a9cd939465fa07d250b82f0be96.pdf
    • https://static.usrfiles.com/ugd/07625c_d95910c2798444acb70dc41b9713657b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a6048dbb0ca424ebf1ff9e8cf645d5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa4956cd0a6c44faac8d2f66fbb55a3b.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_off00007336.bin
99c6bd6f2e5b45e25ab67e543967ae9714914d26777404418324a2ca3358b237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7336 5244 bytes
font_01_sfnt_off0000850e.bin
91b76a1a971fec7456d47536dfaed847c83a2625a959609babfa2a3bcf9f6783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850E 10036 bytes
font_02_sfnt_off0000a764.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA764 4324 bytes

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