Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c6899c2a0d9f28…

MALICIOUS

PDF

35.0 KB Created: 2020-08-05 16:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfdd2a75d3890f376a88acccdd192b3b SHA-1: 56850404de64b6b429717d5b996159eae1948845 SHA-256: 27c6899c2a0d9f28dff2f9e16b4cac1ee24f9e1c76de89d41e667dd5ee4eb266
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=amit+goswami+el+universo+autoconsciente+pdf, which is likely used to redirect users to a harmful destination. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.com/pify?keyword=amit+goswami+el+universo+autoconsciente+pdf
    • http://files.multiscalar.de/uploads/1/3/1/4/131454106/aa2c321.pdf
    • http://files.ghitaandersen.com/uploads/1/3/2/8/132815882/zagavove_wofusurapebikig_zemajibomi.pdf
    • http://files.alexloer.com/uploads/1/3/0/8/130815026/5508471.pdf
    • http://files.misfitspolitics.com/uploads/1/3/1/4/131453268/jodotar.pdf
    • http://files.doublecreekfarm.net/uploads/1/3/0/9/130969656/gukemuxigim_jovobopufunero_jedugoluzavok_pubida.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/lebujixesaligipetuwor.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/bronkitis_kronis_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0449/8564/7272/files/python_array_of_objects.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/vogeduxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/miwof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/knex_roller_coaster_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/nike_coaches_of_the_year_clinic.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/fipufagorijotifopatebovar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/pakusuweg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/jubikodamupixewoposuripa.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_off00004a71.bin
ea0d5b6e15639575521c01e8cfd66813be244be412dcf6eadbeecda24ae4b4e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A71 5616 bytes
font_01_sfnt_off00005d94.bin
217be6fcd55e8066d3b6754c925892bc937800358192a70615b282f1e3fdfc18
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 9840 bytes