Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5c51a82f5e886d…

MALICIOUS

PDF

113.1 KB Created: 2020-08-08 11:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1da3f5a3b9f2b4a310a2c3e9e91e24b1 SHA-1: 5c3e07f5673c763d52ef0db7059d03247f76b3fc SHA-256: 9d5c51a82f5e886dc984c5bf41f76ca516bd3983db4c192343445e331cf7d2f3
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=alter+ego+1+plus+guide+pedagogique+pdf
    • http://files.anglemidwest.com/uploads/1/3/1/3/131384113/mimewe.pdf
    • http://kebuxisak.tucsonactionnetwork.com/uploads/1/3/2/6/132696194/541161.pdf
    • http://files.newukmusicals.co.uk/uploads/1/3/1/0/131070089/879af657.pdf
    • http://liriguvun.nuggfit.com/uploads/1/3/1/6/131606490/5638019.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/atresia_bilier.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/xomebigosojesixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/gedavavawimemunadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4404/files/situboburetojakimebizeror.pdf
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/fodozetafazitajurozibep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/46301634361.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7555/files/pujemas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/redamawinax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/pitubaxapujosilufewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/13200528697.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0213/files/doxewufawore.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/wivufapumotexoroxeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/puzatanowurutewezar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/92050231649.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_off00016a2b.bin
d86217a2d4172c1922e45e9a96218519743540008a2c54f675901b6e7d42938f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2B 5376 bytes
font_01_sfnt_off00017c87.bin
2e05abdbf3e691b5fa5a031dd452a64f063b766cd6e3cd3c08e62414e3c0dc7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C87 10644 bytes
font_02_sfnt_off0001a0cf.bin
4f66cb4358c5540adef52c5caaed0eabc63d4f7fc3f2586db40fb91b8eddafa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0CF 16284 bytes

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