Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dac03ee93ad7b7…

MALICIOUS

PDF

35.4 KB Created: 2020-09-02 12:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bbc2f3f455d0cd351047756cd78f04 SHA-1: b893af781d728f196ef043ded2a50151f2af5951 SHA-256: f0dac03ee93ad7b764fda0cc50595e97a7b359b134b40bb0cb815c7c9ff9c97a
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector infrastructure, which is likely intended to lead the user to a phishing or malware distribution site. The document body contains text related to piano sheet music, likely a lure to disguise the malicious intent.

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.ru/wix?keyword=whistle+while+you+work+piano+sheet+music
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/65849737467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/o_liberalismo_contemporneo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/minecraft_calm_4.pdf
    • https://static.usrfiles.com/ugd/b8c837_15a4f5a93a2748b7bd9503e57016333a.pdf
    • https://static.usrfiles.com/ugd/f967ac_12fa3381e9f74e7989e43a1b52a697a7.pdf
    • https://static.usrfiles.com/ugd/07e02c_08dec63df5e04f349156d6a8e63cf747.pdf
    • https://static.usrfiles.com/ugd/5f4192_46c6898b523a4860a73a9064f49011f4.pdf
    • https://static.usrfiles.com/ugd/38bf1f_1d28637270754193bc3db8e9fdc1f3b0.pdf
    • https://static.usrfiles.com/ugd/e4ff69_d2c3fc145e284fecadd5430c99782b39.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/61264342456.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/43001986650.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/67521277519.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_off00004bce.bin
45df3d3367a2b67c563207c92dd55185bfd9df6ad013207af6912040a97d123d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCE 5444 bytes
font_01_sfnt_off00005e41.bin
c978843a423e00479a2cf112371db80971fa3ab5d15d4d945c41ea2be4a134e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E41 10040 bytes

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