Malicious PDF — malware analysis report

Static analysis result for SHA-256 556e4789142eb623…

MALICIOUS

PDF

48.5 KB Created: 2020-08-16 21:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf58642757449fc8242397ed5962b8a3 SHA-1: 751a787ac9ae5502c32f67955827df280b81e425 SHA-256: 556e4789142eb623fbccdf640860beae094f2f56670320b5c88b907d91a21f43
150 Risk Score

Malware Insights

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

The PDF 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 matches the redirector link found in the heuristics. This indicates the PDF's primary purpose is to lure users to malicious sites through a chain of redirects, likely for further exploitation or phishing.

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/pify?keyword=blade+and+soul+gunslinger+guide+2018
    • http://files.ephratamartialarts.com/uploads/1/3/1/6/131607005/liwobu.pdf
    • http://lobis.heritagelanechiropractic.com/uploads/1/3/2/7/132710621/nidorem.pdf
    • http://mopik.purpletigergonewild.com/uploads/1/3/2/8/132814930/868666adcc1cd.pdf
    • http://files.dividendhomes.org/uploads/1/3/0/9/130969279/2453476.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/jitoxiliden.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikakaxudote.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/nusirotixosob.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/factores_biopsicosociales.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/70671588784.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/zubivudanumewaxesup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0450/4610/4222/files/84982575551.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/68202570759.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/clustering_algorithms_in_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/gojusotizakezemogafokowuf.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_off00006921.bin
82a3396ecf3490b20e04aa06da98f5b00dc62d7f5c329e7a8e7b2d0fb07ae7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6921 5564 bytes
font_01_sfnt_off00007c11.bin
c42639c7959f3605c66419bd939066efa88427ca7ee55b754e791005d08b4682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C11 9896 bytes
font_02_sfnt_off00009e36.bin
0c821ab8ec5063b4beb8ede8a2eff403379680b662fede973bf6fe49e651f125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E36 16744 bytes

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