Malicious PDF — malware analysis report

Static analysis result for SHA-256 c696a8e72cf932db…

MALICIOUS

PDF

57.1 KB Created: 2020-08-18 13:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325a78541326aeea20be0c6222b0eeea SHA-1: ee85c8379ca9715cf4edac941a85f5467557306a SHA-256: c696a8e72cf932db6460fa0f63f7907da0785d8cfbb6cca072e43295cd413cd3
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cloudformation+template+ec2+instance+example
    • http://files.bgsperformingarts.com/uploads/1/3/2/6/132682862/9336433.pdf
    • http://pakek.connollyspuppies.com/uploads/1/3/1/4/131408008/5f323.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8827/files/godekezikurogigar.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/64551211572.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/kematewuxajud.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/xuzuwotonajetopiwegis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/troybuilt_horse_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/comment_fusionner_2_en_un_seul_document.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9517/files/16694747232.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/zevebefutefodorijibok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/17780510218.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/79498467700.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/15088961682.pdf
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/avancemos_2_textbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/burozabufon.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_off00009745.bin
1bbd9e8b4122367fd5e0a1206585755c13ef893c571bc2c61dd5ea5cf422c277
pdf-font-stream PDF embedded font (sfnt) at offset 0x9745 5408 bytes
font_01_sfnt_off0000a98e.bin
fb8e4d795d38cb2955bfe556bafa9d82bca9545b506fd9b12e80b2b8de1a2ee9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA98E 14408 bytes