Malicious PDF — malware analysis report

Static analysis result for SHA-256 86051b7725694dcb…

MALICIOUS

PDF

46.0 KB Created: 2020-08-28 04:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b541a9139447c9d9115cc79eaa6781be SHA-1: ae2bdb9d94d9fc49ba20605f854a1bf7a4d81b57 SHA-256: 86051b7725694dcb8222f6af170b496ee57915f3e59377e2529f9eb9413647bb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains a mass external link farm, with many links pointing to potentially malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.club/pify?keyword=party+buffalo+drive+explorer as malicious. The presence of a 'download button' lure and the ML classifier's high confidence further support a malicious intent, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/pify?keyword=party+buffalo+drive+explorer
    • http://files.heavenlychurch.com/uploads/1/3/0/8/130814042/e18bcf1e.pdf
    • http://wozasafod.modernhomebuyers.us/uploads/1/3/2/6/132682076/6052651.pdf
    • http://files.sueattalla.com/uploads/1/3/1/3/131379268/845791.pdf
    • http://motinewo.ppcwatchdog.com/uploads/1/3/0/7/130775403/448842.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/3038172736.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/jacoco_test_coverage_report_gradle.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/munode.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/ativador_do_office_2013_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4770/files/54369013706.pdf
    • https://cdn.shopify.com/s/files/1/0448/1178/0257/files/high_blood_pressure_diet_chart.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/jorubuku.pdf
    • https://cdn.shopify.com/s/files/1/0428/0752/5542/files/20688127563.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7408/files/pepabunozuxusev.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/la_caida_de_los_gigantes_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/sekifiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/9013/0584/files/adobe_after_effects_cs5_tutorials_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6260/files/82051139766.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000671e.bin
1cf8ee6a064094361efbf678df6d245aa835bf7285813ec422a10cb70433219a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671E 5004 bytes
font_01_sfnt_off00007841.bin
91046ba8c3f753b7c0b08b796a60fffdd86e6796b997d4fecb401fa1de7a115e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7841 10788 bytes
font_02_sfnt_off00009cae.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.