Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1245b207a595c6a…

MALICIOUS

PDF

37.0 KB Created: 2020-08-14 14:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41b47543f6621a5ee73d47b303371cc SHA-1: e6edf851a906dda5b1154aeae0c243441abf73de SHA-256: c1245b207a595c6a656acc50ef581b8f0ed2323859fcdb7f3f99d3dcffb5d732
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, redirects to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Whatsapp cartoon funny videos' and the malicious URL, suggesting a social engineering lure to drive clicks. The ML classifier also strongly indicated maliciousness.

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=whatsapp+cartoon+funny+videos
    • http://files.granitecommunitychurch.com/uploads/1/3/1/3/131379692/lebunejalefi.pdf
    • http://files.agextonline.com/uploads/1/3/1/4/131407089/zugina.pdf
    • http://files.dan-ebert.com/uploads/1/3/0/7/130775958/tumodukoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/nirusud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/70844409620.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/didewebok.pdf
    • https://cdn.shopify.com/s/files/1/0435/7688/5416/files/ibps_computer_awareness_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/jeravivaxize.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/76668861095.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/zifapel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4086/files/asterix_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/tilozefazofosabaxojajod.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/healthy_relationship_boundaries_worksheets.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_off0000531d.bin
16d203b8b47a2d0a0237e3f7e36a9dd74228c372a8f11e6c3d65b4db3c773561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531D 5388 bytes
font_01_sfnt_off0000657d.bin
505a33af103e32cd9e69e41a83841723ac8cc4343a3deac9f764a189ba52b6ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 9808 bytes

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