Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ea155dbc8ed25c…

MALICIOUS

PDF

37.2 KB Created: 2020-08-08 20:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd45c3aaee67d18bbb8335aad6a448e SHA-1: f43e6d927593bf1e83d1d541001b70ff1949e495 SHA-256: 34ea155dbc8ed25c41995c035621a77e723e4ee8066788185e3ae2a87af9dab9
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to attract search engine traffic and redirect users to malicious content. The presence of numerous Shopify-hosted PDF links suggests an attempt to disguise malicious activity within seemingly legitimate platforms.

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=budismo+moderno+livro+pdf
    • http://files.alleganyrescueems.org/uploads/1/3/2/7/132740925/3ce9c9142c6e.pdf
    • http://files.thuiswerken-callcenter.com/uploads/1/3/0/7/130776327/gizapefiw.pdf
    • http://files.fullyalivefamily.com/uploads/1/3/0/9/130969305/7539189.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/visorevunixuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/zasukijosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/kejijumemirarurotu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/gogakip.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1480/files/31351794929.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/19313118928.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/wotutixepiwaragovov.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/60517021129.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/zulidexugidudamanume.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5386/files/hernan_cortes_biography.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/gorib.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_off00004aaa.bin
5245162eb15d2e927da00887389955d3e25ec032a54000a13910f7d2c8c3015d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAA 4888 bytes
font_01_sfnt_off00005b24.bin
a8cf92438d732af07446ba85e27dad42114babdccfcb34c527c9961ed6457ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B24 9036 bytes
font_02_sfnt_off00007a05.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A05 4324 bytes

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