Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f44ee875f96ce3…

MALICIOUS

PDF

41.2 KB Created: 2020-08-09 09:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c863230aaab026a582531207fcea160 SHA-1: 0dff5afc47b875736f1198b5cffe0a6a6f0edc61 SHA-256: 66f44ee875f96ce32fedc426b8f565db96b56ff62e05acc96e6a28f148ca9eac
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting it is a research PDF, likely a lure to encourage clicks. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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.com/pify?keyword=examples+of+assumptions+in+research+pdf
    • http://ganafore.bigislandghosttours.com/uploads/1/3/0/8/130814297/5400947.pdf
    • http://batepip.bobbybrown.org/uploads/1/3/1/6/131637309/dijufu.pdf
    • http://jekazi.123-give.com/uploads/1/3/0/7/130738799/741fa03989e9d99.pdf
    • http://files.oxfordcitylionsfutsal.com/uploads/1/3/1/6/131637527/eb3b0.pdf
    • http://lozoxomex.ucalumniband.org/uploads/1/3/1/6/131636725/5642201.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3700/7778/files/panufimifajefuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/how_many_graham_crackers_in_a_package.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/30972389002.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/28418313941.pdf
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/common_stocks_and_uncommon_profits_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/65894334100.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/kalma_tauheed.pdf
    • https://cdn.shopify.com/s/files/1/0434/8248/0806/files/attila_pizza_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/5902/5822/files/gasinurememepifojasaveguv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/13870250408.pdf
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/99208331827.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/modul_bilangan_bulat.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006431.bin
1c1bd91ded72080b703308f1a13792caf547e7eec8ff5a59fb87c61631c584fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 5420 bytes
font_01_sfnt_off00007676.bin
f434471f22657cffbb43b57e962dcf1c24afbc7475f1d8ff95833e39c66613b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 9788 bytes

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