Malicious PDF — malware analysis report

Static analysis result for SHA-256 7011ccb18108742e…

MALICIOUS

PDF

50.1 KB Created: 2020-08-17 02:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 886ee54862f2fa972e814a4e60878966 SHA-1: 324cbc9651234ab914f80f0f1f2a6a2568841c14 SHA-256: 7011ccb18108742e4b3cbe913266c3ae59493b4016c69249de05b309f3949dfe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains URLs that are also present in the embedded link farm. This suggests a coordinated effort to direct users to malicious sites, likely for phishing or to download further malware.

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=ameba+pico+mod+apk
    • http://tepizer.52badstoriesandmore.com/uploads/1/3/1/6/131637257/2cc9e0c21839b.pdf
    • http://files.embodiedtherapysantarosa.com/uploads/1/3/0/9/130969505/6688783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0825/3344/files/28059165879.pdf
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/cfop_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/drdo_ceptam_8_notification.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/la_roux_in_for_the_kill_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/50356873500.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/zimubagezowarufoxig.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/evenflo_symphony_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/10518586219.pdf
    • https://cdn.shopify.com/s/files/1/0450/9148/7909/files/jzyk_angielski_swka.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/aprendiz_de_brujo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/7747323755.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/numeros_ordinales_en_ingles_pronunciacion.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/dissertation_acknowledgements_examples.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647a.bin
632d66ee6a68c740d5350b94f951d11a558acf8005170ee972b7422134863123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647A 10792 bytes
font_01_sfnt_off000087bc.bin
e45c9ee42ce1112ff86897517545e0c91e03b0191bc000d50ba7e02d7ffd2229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BC 5104 bytes
font_02_sfnt_off000098ff.bin
30d578435b86a42db2239a1d261d68c839693b115cdb0023618d7b8d7eb7ea37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FF 10084 bytes

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