Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce44d6532c88422…

MALICIOUS

PDF

56.9 KB Created: 2020-07-30 04:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a97d88e4d2525993bc1c5ef394e9e5de SHA-1: 3424e072c0f5a1e5ee3771c022b1abc66ed10490 SHA-256: cce44d6532c88422307923f8031df6ebf9a3dab157803c7b790cb1e8efc70035
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm behavior, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Guia ceneval 2020 acuerdo 286 gratis pdf', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=guia+ceneval+2020+acuerdo+286+gratis+pdf
    • http://files.sanchezartgallery.com/uploads/1/3/2/8/132814272/linenijasobesolebane.pdf
    • http://files.upandovered.com/uploads/1/3/0/9/130969683/dijukabirolexox.pdf
    • http://files.wrestlingjerusalem.com/uploads/1/3/0/7/130740180/rumowiwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/beluxizawatek.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/95112133623.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/50880741643.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/45475406379.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4983/files/94957979675.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3095/files/20304971092.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/58345986264.pdf
    • https://cdn.shopify.com/s/files/1/0430/3310/0439/files/91107007728.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/wetovanaboda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/wufifekemiji.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/64668244218.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/
    • https://cdn.shopify.com/s/files/1/0433/4272/527

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e11.bin
3f89100cd6d67c2378b840ce5f9f508363f63f81593b36e804ebcd0fb0e11c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 5916 bytes
font_01_sfnt_off0000a245.bin
ba4ecc71301c5b00809cd64b5b2dc26d8a47cf951008c904819ab9a55f954792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA245 16508 bytes

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