Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be6b2156a52b1de…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 04:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a55eb144ba4e12b37084d6e791e443e4 SHA-1: bbd57d1b1cfbb85a856ae3f6d0ca0400a85bbee6 SHA-256: 7be6b2156a52b1de79d4a6b47ffb58beccd93670ec842fffa98c9c208145e4ff
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. The presence of numerous embedded links, including one to a potentially malicious redirector, suggests a phishing or malware distribution attempt.

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/wix?keyword=how+to+memorize+the+nashville+number
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/lomoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/short_hunter_gun_killer_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/7626/3841/files/gajitisovo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/81047509507.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/94660666302.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cad3769a64b436eaf0587d4bffad57c.pdf
    • https://static.usrfiles.com/ugd/26481d_6c25c7389cca4e52b2d25df40c16afcf.pdf
    • https://static.usrfiles.com/ugd/469aea_7fc6bb5408a4475890818e5f7265a4a5.pdf
    • https://static.usrfiles.com/ugd/73c254_80842e6c044345498c66d4ceb1ae9963.pdf
    • https://static.usrfiles.com/ugd/136d07_3d8762a1b3af4fe9afedb4803338b521.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_b9e61588aed14f51a6d5b40102d6fb3c.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_off00006432.bin
94f56cc51d5e796d3222190d1f99c14e8bf29332f7f9d91d8da3defcb3c5410f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 5228 bytes
font_01_sfnt_off000075eb.bin
d359181b9d8066981753a4b12e9d6809dc80a29638d1168d69b5b294f671dc08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EB 10696 bytes

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