Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1549537fc353031…

MALICIOUS

PDF

122.1 KB Created: 2020-08-13 13:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab198c156f19554ab4c56cb94def696 SHA-1: 84dd315a0e71df0c125e335fe9f6f41699cd10e2 SHA-256: f1549537fc3530312b01d36763b53381416cf816f662f268d06aba3700320448
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into clicking a link that leads to malicious infrastructure, likely for phishing or malware delivery. No scripts were extracted, limiting the analysis of specific execution chains.

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/wb?keyword=netter%20neuro%20atlas%20pdf
    • http://muxufu.humboldtneurohealth.org/uploads/1/3/0/7/130776445/lekizerir.pdf
    • http://wujovari.theskullzsalon.com/uploads/1/3/0/7/130776485/1688806.pdf
    • http://gipawin.legacylec.org/uploads/1/3/0/7/130776031/waliwumejuxudosox.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/pedumomu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4746/files/jigoruz.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/cats_in_the_cradle_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/momexalemobumufafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/how_to_craft_eye_of_ender.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/tanosediwiziki.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/jupegenemajiwutadegiwiwuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/siwafadazuxuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/jifisajobamire.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/78370961104.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ef2.bin
664ee201fc3a4c51748d8ee47cad3c03bd577f43ad1ba23258799d86706e8b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17EF2 5004 bytes
font_01_sfnt_off00019001.bin
03781c46ea965c97011ed9532e752d1387886e9626c3659a831fb1d842324da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19001 2212 bytes
font_02_sfnt_off00019977.bin
82a8b9e83fd09193059352e20341942857d3ed8bf0f520747fd95e4d2ef9b441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19977 16092 bytes
font_03_sfnt_off0001cb41.bin
b285e630ec63bb8d6f5237e366bb15089b3a39ba07355632f1d5bca99b4690de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB41 6152 bytes

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