Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9191c0ec17b1882…

MALICIOUS

PDF

45.1 KB Created: 2020-08-06 21:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c9f7802903df84177321039cffd8c20 SHA-1: fc729d9da94317ab4742e00cec4736ee13300ea6 SHA-256: b9191c0ec17b1882a7e90b6daeed539419531d351010d9df9b9aa5a296e34288
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs. This suggests a link farm or SEO poisoning attack designed to redirect users to 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.ru/pify?keyword=geographical+information+system+nptel+pdf
    • http://files.titanguitars.com/uploads/1/3/1/6/131606874/5755983.pdf
    • http://gasezapi.equineofficesolutions.com/uploads/1/3/1/4/131452903/nogefab.pdf
    • http://files.lostarkwoodworks.com/uploads/1/3/0/7/130776887/bonagat.pdf
    • http://files.jamiemuffett.com/uploads/1/3/2/6/132683484/rifikitif.pdf
    • http://files.rmarredondo.com/uploads/1/3/1/3/131380741/dunivogoxelo_wutaloboriruwes_baxatuvofezu_repobavasen.pdf
    • https://cdn.shopify.com/s/files/1/0434/5603/7017/files/39189458315.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/88557725508.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/57608638913.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/72370475784.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/178981732.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/10237046996.pdf
    • https://cdn.shopify.com/s/files/1/0437/8994/2945/files/retinopatia_hipertensiva_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/python3_socket_eth_p_all.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/python_language_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/fapitinesa.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/application_letter_sample_for_fresh_graduate_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/bourne_supremacy_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/2566/1095/files/wirokoworimuvupewixumu.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_off0000623e.bin
c3fb55b0fa5effb4602902eb69de153921608c44b6013081cca46bab3ae92963
pdf-font-stream PDF embedded font (sfnt) at offset 0x623E 5492 bytes
font_01_sfnt_off000074c5.bin
7df07c8b6858e7c7826b38d969b4618f282817a2ad8873913c3d6511d06e7769
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C5 10600 bytes
font_02_sfnt_off000098f7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F7 4324 bytes