Malicious PDF — malware analysis report

Static analysis result for SHA-256 a172d005a5b5affe…

MALICIOUS

PDF

42.9 KB Created: 2020-09-18 11:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa81b0ea9315e4e92e7c43685b820754 SHA-1: 89443d9fcdc137132a55e265c996ec61dfdf90a2 SHA-256: a172d005a5b5affe01c862d701244a4fd2ea64d818f69601d7336b914e319a54
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with keywords related to 'Mario brothers'. This link, 'https://ttraff.me/wix?keyword=mario+brothers+flash+unblocked', leads to known malicious infrastructure. The document also features a link farm of other PDFs, indicating a potential SEO poisoning or spamming campaign. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=mario+brothers+flash+unblocked
    • http://files.electaylin.com/uploads/1/3/2/7/132740320/8322645.pdf
    • http://fafidok.gekkosubudbali.com/uploads/1/3/2/6/132682555/1704818.pdf
    • http://files.helenthorgalsen.com/uploads/1/3/0/7/130738553/renexisuni.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/descargar_evangelios_apocrifos_completos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/34061283993.pdf
    • https://cdn.shopify.com/s/files/1/0440/1001/2837/files/rock_en_espanol_radio_stations.pdf
    • https://cdn.shopify.com/s/files/1/0440/5159/5429/files/71457892614.pdf
    • https://cdn.shopify.com/s/files/1/0439/9972/3678/files/download_english_to_urdu_dictionary_in_format.pdf
    • https://b8bb2de2-13f2-4688-8aee-1ddf2779aee4.filesusr.com/ugd/e66789_d06a0996beb64738a50b235196615780.pdf?index=true
    • https://40531282-6864-4235-84fc-1392ce43b2a3.filesusr.com/ugd/3724a2_2231bce6abf44c19adee0f86d6050000.pdf?index=true
    • https://3626661a-a06b-49a0-84a8-e6c7fcf9326a.filesusr.com/ugd/c67d0c_e11463e7e15748baa8d38bced2b73298.pdf?index=true
    • https://96d2bf39-8a2b-4e07-a626-8300d86fa5d4.filesusr.com/ugd/035627_c842ea8938fc49a89f66b25ed8ef91ef.pdf?index=true
    • https://4126567b-0d95-427c-8b40-43763ea7672a.filesusr.com/ugd/76156b_ae7b84b0aa3748f2a979045bc9144c7f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/dafuwalevinoneralonorelu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/physics_gre_flashcards.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_off000069cc.bin
a34aea280179f6fd1eaf82456f337fda4a239751847d24557b21213825b54b57
pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5320 bytes
font_01_sfnt_off00007be2.bin
9900212ac4d8d391d628b0581843bf9dc2d0f73d097253b301e503baa7f2be01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE2 10252 bytes