Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e519cc946a8807c…

MALICIOUS

PDF

46.2 KB Created: 2020-08-10 02:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab15e6c4c84aa71e5a9f6c1525e2a5e3 SHA-1: 17c50afeca0d60ff32bc138195a0f8d11678d9d0 SHA-256: 0e519cc946a8807caf3c8749b7e20424be2044e753af956eff3a6ac0ea993452
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute the 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/pify?keyword=active+directory+group+policy+tutorial+pdf
    • http://files.columbuschristianacademy.com/uploads/1/3/0/7/130775762/6236994.pdf
    • http://files.thewarmingcompetition.com/uploads/1/3/1/6/131606094/gotob.pdf
    • http://files.untbom.com/uploads/1/3/2/6/132681501/c8ddb4301ee82d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/candlestick_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/4130922211.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/deep_meditation_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/6174728020.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/gevivi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/88099700739.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/worawizimefebuxajekivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/milexunadejas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/90219993765.pdf
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/6320491912.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/fijepexega.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/encyclopedia_of_african_history_and_culture.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075e8.bin
1f540d63013f71ed19f8840c31994881bb60cf5052bef47293a57fd768325b88
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 5296 bytes
font_01_sfnt_off00008814.bin
8d90d8c7481d6f588f5ec81ccee46337d4ff3a68d5fd93c675c74347aedd537b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8814 10360 bytes