Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ce4539ed49efda…

MALICIOUS

PDF

50.5 KB Created: 2020-08-11 01:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa1e9dbc0de4ed43eb9ab0cc6eb1c6a2 SHA-1: 84cea28c81c29d09d1b4576db691de22e94cd31c SHA-256: 77ce4539ed49efda0c8b78b3fdfd7b40107abbe92924b1b30cc88d9290d4e444
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the document links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The presence of numerous links, including one pointing to a malicious redirector, suggests a link farm or phishing attempt designed to lead users to malicious content. No scripts were extracted from this sample.

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=acuerdo+de+paris+cop21+pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://files.mlrmasterpieces.com/uploads/1/3/0/7/130776460/d2a7b4a2cd6.pdf
    • http://files.thebattleformaumauisland.com/uploads/1/3/1/4/131438018/823128.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/konsep_bilangan_bulat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/slam_by_walter_dean_meyers.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/famifezolijiposedidibig.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/xixusomizoperob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/68540954385.pdf
    • https://cdn.shopify.com/s/files/1/0430/8821/6217/files/gisororinikoduxujazad.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/xofipigeto.pdf
    • https://cdn.shopify.com/s/files/1/0439/4385/4235/files/wd_my_passport_driver_windows_7_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/zakofatura.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/75020343475.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_off000077a3.bin
e75eaf312be461a3d4813553cb01e027acc929f2037004317c90602d0bf9df81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 4988 bytes
font_01_sfnt_off000088a9.bin
dabec045f89e823a0630f225de1b0cce0de7c55cdf109ed95f3630d322fb01ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A9 11268 bytes
font_02_sfnt_off0000ad7c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7C 4324 bytes

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