Malicious PDF — malware analysis report

Static analysis result for SHA-256 525a30458c97dbef…

MALICIOUS

PDF

41.1 KB Created: 2020-08-16 00:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb392c4593e603e083f92b8482c2f7ac SHA-1: e2aaf87ed9b6c07114b6458a0869186ca77059f7 SHA-256: 525a30458c97dbef0437ccfbea3ee915a0b09ac7b13dfb0edd29deb846f8e97f
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This redirector is likely used to funnel victims to malicious sites for phishing or malware downloads. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute content widely.

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.cc/pify?keyword=video+facebook+via+pc
    • http://files.niassestudios.com/uploads/1/3/0/8/130874318/b919e96e4ba.pdf
    • http://witur.spokanepagans.com/uploads/1/3/1/3/131397989/xokokejelak.pdf
    • https://cdn.shopify.com/s/files/1/0458/6120/8217/files/vonawupugatesesitenamo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/21878433103.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/tekkit_legends_sphax.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/38650228299.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/how_to_make_polyaniline_subnautica.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/gasixawos.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/28456916616.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/interview_questions_for_manager_position.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/33251080063.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/pokemon_go_ipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/14255120636.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/
    • https://cdn.shopify.com/s/files/1/0431

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ee.bin
5170679ac327e554e2df967bbf49f8ac2a802b53964584fdc3a6aa106f06b506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 5072 bytes
font_01_sfnt_off0000754f.bin
eb7861ce9f42f68d9c24ea05714d79cd195586c8d2ca54bf5a90b58750a24545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 10060 bytes

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