Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace6f9a36ae5a035…

MALICIOUS

PDF

50.4 KB Created: 2020-08-15 01:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b07254f26eaa3ad86bf4cf4014520fce SHA-1: 2bc4bf20e5eed5bc6ef02be8df052570e7c529c2 SHA-256: ace6f9a36ae5a03567e920125207a578edaeb3e6b71d43434afb5972369f8374
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=uc+browser+pro+apk+2018, is likely used to funnel users to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files hosted on various domains. The presence of a link farm and a high ML classifier score further support the malicious classification.

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.com/pify?keyword=uc+browser+pro+apk+2018
    • http://mulaza.blaine-bacchiocchi.com/uploads/1/3/2/8/132814930/dapalenemuwukos.pdf
    • http://files.missionboostconsulting.com/uploads/1/3/0/8/130874307/53a04defa6.pdf
    • http://noviseta.gokulsarma.com/uploads/1/3/1/1/131163667/2060835.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/vekor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/vabine.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/65257964772.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/bohat_tta_chud_tta_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/30312421113.pdf
    • https://cdn.shopify.com/s/files/1/0434/7871/2472/files/jaxivigebodarapovozesulaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0363/9970/files/download_asterix_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/pedazajaluj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1552/7833/files/suwunediwanuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/jonat.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/75553715215.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bf.bin
bf5ac17f9fc0246766ced62d9f4a8fbe985a77e60131c13a884b4cbc9ac9a4ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BF 5256 bytes
font_01_sfnt_off000074b1.bin
b9a356a5169198c34b8508c62674798ae4a489c3eccaf9d274d19ea084a6867a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B1 10636 bytes
font_02_sfnt_off00009878.bin
358fad4b74ef85afceb5f7d71d316d3f153efca535cadda945ed42ba561ad9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9878 16452 bytes
font_03_sfnt_off0000ae8a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8A 4324 bytes

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