Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f3f4d30d6a7351…

MALICIOUS

PDF

52.4 KB Created: 2020-08-24 10:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 471e1253febe0a2d7af7a193e7d73da8 SHA-1: d54093af72cd2888216147238c8bad001597beae SHA-256: b6f3f4d30d6a73513af8d73fee6ef208cc1146eb37e20444400488114f706680
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for link farms and redirectors. One of the primary links, 'https://ttraff.ru/pify?keyword=visual+studio+code+format+c%252B%252B', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this malicious URL, suggesting the document's purpose is to lure users to this malicious site. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicates malicious intent.

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=visual+studio+code+format+c%252B%252B
    • http://files.azanglicandeanery.com/uploads/1/3/1/8/131856646/2960053.pdf
    • http://wakun.stjamescheboygan.org/uploads/1/3/0/8/130813042/fanoxegika.pdf
    • http://files.andywhiteanthropology.com/uploads/1/3/1/4/131407299/d7c3483.pdf
    • http://pazereb.shrewsburycobblershop.com/uploads/1/3/0/9/130969690/5872923.pdf
    • http://files.dgassoc.net/uploads/1/3/1/1/131164520/sabizopimatoziwujif.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/best_architecture_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/75506618300.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/53355003463.pdf
    • https://cdn.shopify.com/s/files/1/0449/8518/8511/files/86459833612.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/14069161540.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/52240989577.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/taxasitul.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/jarox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/vesowobejelub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/framed_ink_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/eminem_albums_free_download.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_off000076dc.bin
1af9a0e7aab618ef8552686755bdbc2c69041671dbd76da52b3b4f13b1c5b3b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 5132 bytes
font_01_sfnt_off0000882f.bin
093819e4b76d1bd20e6cef35d2dbc6fb5830d02d4788cf9d56da14651ae8573e
pdf-font-stream PDF embedded font (sfnt) at offset 0x882F 11640 bytes
font_02_sfnt_off0000ae1a.bin
7f63fc1f92c723635f3827b4e5338cdce3689ebe5aacf7de028d43515b23bcd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1A 16524 bytes