Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee28f5ef86189f4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-31 02:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee464a68fa88a3391ddd80cf999c3bf7 SHA-1: c020f51693561ac005de0eedcce349b41e59333d SHA-256: cee28f5ef86189f45a48471df34360a22aa4029ae1f8514a5945f221bc682a5c
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Clash of Clans cheats' and the malicious URL, suggesting a lure to trick users into visiting the redirector. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content.

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/wix?keyword=clash+of+clans+hile+temiz+bilgisayar
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/dakenoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/xulurasuzosuworumefedeje.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/vatefopototosoba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4218/4095/files/relatorio_de_auditoria_informatica.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/8552778637.pdf
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/common_arabic_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/lexepilovirefaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/carta_de_apresentao_empresa_prestadora_de_servios.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0f40f6d51cd4ed3a4cd5aecdc74f11a.pdf
    • https://static.usrfiles.com/ugd/de3d83_16fc8d95dc204028aa38edaf59813f57.pdf
    • https://static.usrfiles.com/ugd/fe83c3_098fe91e63b747cb9f9246e295c371ce.pdf
    • https://cdn.shopify.com/s/files/1/0430/8107/2789/files/oxford_picture_dictionary_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0440/5959/0806/files/59639965544.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/maxexijuxexufadebuwobolej.pdf
    • https://cdn.shopify.com/s/files/1/0429/0913/9110/files/60248021902.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/xuxubofekidonubasunopi.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_off00005478.bin
80d535393ada6d7c5a651ecef74daaf646a28e2ece5346a9deccfb6aa2488f71
pdf-font-stream PDF embedded font (sfnt) at offset 0x5478 5492 bytes
font_01_sfnt_off00006706.bin
8754ff88985cd2ab8e8c501403b2c13682aed20b9ea005177499fa3ca54c2831
pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 12204 bytes