Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f4159dcde91a18…

MALICIOUS

PDF

48.8 KB Created: 2020-08-23 21:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996dc2898dff209df064e1f60ba3bd8b SHA-1: 7f722bbc7530d63a0020bab38d10386a1bfc648e SHA-256: 49f4159dcde91a1892918fe332709d52155927bbc179a052f3d6dd90e58e4b35
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL and a keyword suggesting a lure related to 'Charles proxy certificate android'. This indicates the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=charles+proxy+certificate+android
    • http://files.totaltechwv.com/uploads/1/3/1/8/131871518/jisuvomogulomotax.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/achievement_motivation_journal.pdf
    • https://cdn.shopify.com/s/files/1/0435/6777/5905/files/acrylic_sheet_cut_to_size_toronto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/character_strengths_and_virtues_christopher_peterson.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7348/files/kikubabanerupan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/80382225201.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/wutuwizumaxikulitizor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6781/files/jajudigibinon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/48278171192.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/xixekuxuduref.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/dagoxurilapuruwimuxof.pdf
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/xubozibefamozume.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_off00007f94.bin
b41a0825b40ce049c0148bc021ac9fd3abcd964321d477aa7e6577f9c5ef829b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F94 5320 bytes
font_01_sfnt_off000091a4.bin
f069831e37da8d2e0a4093d5b7b80be3126fa38cf59c1787914bae657ad0e069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A4 10796 bytes

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