Malicious PDF — malware analysis report

Static analysis result for SHA-256 c332ca79584b57b5…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 21:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1465f5df5f0c09719a7fb97f4387c9 SHA-1: 9034c20595d81dadff3acd03a58ec20c3e2a5dff SHA-256: c332ca79584b57b5f429b10cd62f2223a90f287a56cb111019bdff183c557576
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector link to 'ttraff.ru'. This suggests the document is designed to lure users to malicious sites. The presence of numerous other PDF links hosted on Shopify, though marked as benign, indicates a link farm strategy. No scripts were extracted, but the overall structure and link analysis point to a malicious redirection attempt.

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.ru/pify?keyword=blending+words+kindergarten+worksheets+pdf
    • http://files.hsemusicaltheater.com/uploads/1/3/0/7/130740536/1efb4d1bf1.pdf
    • http://xizafadum.labambamexicafe.com/uploads/1/3/2/3/132303382/rowarotodo-vuxivujofekeku-kakolitinotas.pdf
    • http://files.27andoak.com/uploads/1/3/1/8/131856844/6002040.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/notetufukapumunuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/fekufupogubafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/69864500714.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/47829222443.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/95567936882.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/76792634609.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/41962396499.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/kidamimo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/m5r1_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/13035871378.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/28755328109.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/nipoxul.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/18977822730.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/59408604229.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/72772873013.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_off00006806.bin
0ae44e313f507ce07e3f7426344f6c21d6ccca09f8aacdf0d5f3a3b998dde558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 5508 bytes
font_01_sfnt_off00007ad7.bin
ecffa28dd83ff08b5748670c55bc8bf404ed01d9bc8dee646113a415435baac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10216 bytes

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