Malicious PDF — malware analysis report

Static analysis result for SHA-256 6208b7398d485987…

MALICIOUS

PDF

54.6 KB Created: 2020-08-17 13:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 384d27aa4a2c40afa89382039169fbe3 SHA-1: 097ad88c2274a2fa12eff2cc556038baa2269333 SHA-256: 6208b7398d4859871fd51845f20f8a4a9cb76da2dd1091cebc71b42e01bd2647
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm and a redirector suggests an attempt to direct users to potentially harmful content, such as phishing sites or malware downloads.

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.cc/pify?keyword=badoo+apk+terbaru
    • http://nezite.bocountry.com/uploads/1/3/1/4/131438474/4906143.pdf
    • http://files.puffpuffpasssmoke.com/uploads/1/3/1/1/131164399/4820856.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/92091412071.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/mokafibu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/30393003167.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/compelling_wealth_management_conversations.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/breckenridge_snow_stake.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/participant_observation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/40510899630.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/master_chief_helmet_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/ferdinand_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/11499775759.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/46705456216.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cb.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 6440 bytes
font_01_sfnt_off000074c0.bin
9b0b9b00d250fe04148dab3b9786e09a264753b7bd714d2a6f9d8c39e5eecc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C0 4996 bytes
font_02_sfnt_off000085c2.bin
c896a5a68c7c0f8041d3d2165e6e96e1ee3cfefb718af43f53cb6df747680987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C2 2940 bytes
font_03_sfnt_off00009268.bin
823b3bca95fb65f629b8af1102187cd78729d33e3eebbad6de9320bcd24b5518		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9268 10340 bytes
font_04_sfnt_off0000b5e7.bin
89c4e6f4d9664fbd621897cc1e92e7726fec29a324beeb7a4197236a5d1145db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E7 16504 bytes

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