Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a16b8ae74e9e8d…

MALICIOUS

PDF

33.3 KB Created: 2020-08-24 19:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3c880be0f45128520f44bab819b087c SHA-1: 4750ba9e367d962004625795c24b014d8c90567a SHA-256: 83a16b8ae74e9e8d3c4ff88256c1e5ccfaaef23368d77d85e1b8f24128eeadc1
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The document body, though partially corrupted, includes text suggesting a lure for a movie download, which aligns with the malicious redirector's purpose. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm strategy to obscure the malicious destination.

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=natakam+full+movie+hd+telugu
    • http://vanisaj.thereachstudy.com/uploads/1/3/0/7/130776433/fesubide.pdf
    • http://files.wanderingbydesign.net/uploads/1/3/1/3/131380600/jalonotixoxasug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/hammurabi_code_was_it_just_dbq_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8576/5535/files/11809358484.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/46140442513.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/76609378600.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/37581223220.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/14285525336.pdf
    • https://cdn.shopify.com/s/files/1/0430/1497/9737/files/22441950833.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/1409834489.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/86752491817.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/98718809396.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/petafikidekekade.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/ramij.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045c0.bin
31461d437db0d5d9fcb7012df14f7b15c220f39f97209dedca2b1e129c99c6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45C0 5140 bytes
font_01_sfnt_off00005735.bin
1522d85bdfb683cf621a8262aedb42f4168e0e3421f76814e8343253dc970c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5735 9800 bytes

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