Malicious PDF — malware analysis report

Static analysis result for SHA-256 851b3e069c77e441…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 20:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b85aa6e0d2ac76eacf3d63c50d81982 SHA-1: b8e118f74ca37d51d4b0363b5ae5f52c337b69fb SHA-256: 851b3e069c77e441f66aed2529cf001f001e1d35add3fa8cd16eddc2cefb8a1e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily corrupted, contains text that appears to be a lure for a 'yamaha gct1 tuner manual'. This suggests the PDF is designed to trick users into clicking malicious links, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct payload execution.

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=yamaha+gct1+tuner+manual
    • https://static.usrfiles.com/ugd/9a242c_2bde57550ebc4574821117a6a06a6b79.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b202d7a54d49bcb8fff20e4828ace3.pdf
    • https://static.usrfiles.com/ugd/48d9a1_1d7058ebab2f4a47983159f20291c219.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/40158799507.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/tujetimamej.pdf
    • https://cdn.shopify.com/s/files/1/0437/1136/5272/files/attu_tamil_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/zunijimipinifebome.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/ap_module_grade_7_3rd_quarter.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38030937597.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/78574455570.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/miller_dynasty_200.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_off00005e75.bin
aac8134b4a8ff914108ba4979a9e5b00d8157ca85193e0d389bfbfe00c9d90b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 4772 bytes
font_01_sfnt_off00006e85.bin
107b3933dbe4844d7fc4eae86ebfbb6a3a325bde0afed470ff43d2b15e0c7edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 10684 bytes
font_02_sfnt_off000092d4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D4 4324 bytes

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