Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b287ae3701665ba…

MALICIOUS

PDF

38.3 KB Created: 2020-08-20 10:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03a6f1194164adf01bd0771138f3af89 SHA-1: 1c3bfdb81e6a9edd6461b7444656dfd9bc65340e SHA-256: 0b287ae3701665ba3eb4388f7a908eb41f17a777606181673dedb76336f39945
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains or are part of a link farm, indicating an attempt to redirect users to malicious content. The primary malicious redirector URL is ttraff.ru, which is flagged as malicious. The document body, though heavily obfuscated, contains references to academic formatting and URLs, suggesting a lure to trick users into clicking the malicious links.

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.ru/pify?keyword=citation+apa+format+website+no+author
    • http://jomawex.mthopesanctuary.org/uploads/1/3/2/6/132681268/lozega_nikiti_dodewubuxa_jujepowa.pdf
    • http://zeritozu.bewellbrookfield.com/uploads/1/3/0/8/130814328/b026e81e1531.pdf
    • http://files.danielakfineart.com/uploads/1/3/1/3/131398193/wowozepozo.pdf
    • http://tozofan.lineefraidsen.net/uploads/1/3/0/8/130874359/buzezizem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/pudipojijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/dilutosawudonunaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/27766752126.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/mechanical_engineering_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/romajigef.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/people_s_democratic_republic_of_algeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/nejaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52945462890.pdf
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/sukhmani_sahib_in_hindi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c7.bin
ba7829c19fd80578c4a3d114983c6abfdc9e0fac172748d27ba0d41fca379ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 5248 bytes
font_01_sfnt_off00006a80.bin
3dbf77ccd15caf2623f571e2e1148a37f6bac116db35ddf6c6128ecad87f12ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A80 9932 bytes