Malicious PDF — malware analysis report

Static analysis result for SHA-256 294789aa4f9aa61d…

MALICIOUS

PDF

44.5 KB Created: 2020-07-31 20:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17b82663fae1ad9496b0863482f86cbe SHA-1: 536227c6703990a6f2fc0e615c201ec673730f74 SHA-256: 294789aa4f9aa61da44b6b36fc744a8caa02e87c52f2c236178078cd4fc4b10e
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains the URL https://ttraff.ru/pify?keyword=mastery+george+leonard+pdf, which is a primary indicator of malicious intent. The presence of numerous other PDF links suggests a link farm designed to obscure the ultimate destination and potentially distribute malware or conduct phishing.

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=mastery+george+leonard+pdf
    • http://files.beannaigh.com/uploads/1/3/2/6/132695556/gogupobonapixasibe.pdf
    • http://files.exploretravelplanners.com/uploads/1/3/0/7/130775958/xunixama_gufunida_pipov.pdf
    • http://files.digitalmindset.ltd/uploads/1/3/1/1/131164573/sodepufesas-fedejetuka-kafiwujibugo-kadusezet.pdf
    • http://files.kepasaukulele.com/uploads/1/3/1/3/131398279/buduxed_taworomoxijus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/tukonuxokanuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/4999132140.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/wafamu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7698/3713/files/gozerotonawupu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/19011850963.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/38805820018.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/fawukoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/goronatulagefisov.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/mukatisotuno.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/18910824800.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/99446755412.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/juxidifopuri.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_off000064a2.bin
119803073975b3d82c586c530eba6e3a9ae4b5972e0c6e775dba192a2e8cb136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 5056 bytes
font_01_sfnt_off000075ed.bin
6ce30a5ec29ef28fbe2af93f62d5e9787fda279dd27dfee536c738d1f59c17af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 9664 bytes
font_02_sfnt_off000096e5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 4324 bytes

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