Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7ee3ef482d8a58…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 05:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b8f69df1369b44115ed21cec603da39 SHA-1: e98391e20f4ffc719fcfd38806bc1762bd8391d3 SHA-256: bf7ee3ef482d8a587379c46daa0538f143f6a10458fbd1a0d4a8d81c613f0eb4
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 24 external PDF links, including a redirector to a known malicious infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Tratamiento para neuralgia del trigemino pdf'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=tratamiento+para+neuralgia+del+trigemino+pdf, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=tratamiento+para+neuralgia+del+trigemino+pdf
    • http://files.baxtershop.co.uk/uploads/1/3/1/3/131380985/xuvaxuvikigenukad.pdf
    • http://files.genarchitect.com/uploads/1/3/1/1/131164132/jugeviditej-wevefuz.pdf
    • http://files.onebodywellnesscoach.com/uploads/1/3/0/7/130775362/5001873.pdf
    • http://files.baxtershop.co.uk/uploads/1/3/1/3/131380985/xuvaxuv
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/sudilonifilujujoxibobog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/buxowafitikeforajigawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/29238581725.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/gigatigapigiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lovukapovilelogitolosir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2490/files/beduxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/63471542398.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/peropatasut.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/56215663947.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_off00007688.bin
2f1de9d740c5e557bc81f3876f7c88fdb2a92b0df1e2720a9d806ee4939df233
pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 5012 bytes
font_01_sfnt_off00008777.bin
b5cab8bef7aa18de58b1fb38a679baa01cf535f3554427e82ac822d2c218d538
pdf-font-stream PDF embedded font (sfnt) at offset 0x8777 10844 bytes