Malicious PDF — malware analysis report

Static analysis result for SHA-256 86117be34db5db1e…

MALICIOUS

PDF

59.6 KB Created: 2020-09-09 09:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00eff777448b5ed8c71a82f6cf9ba4f7 SHA-1: f7c34ce9b1245feb1884480efc4153280b0e1a99 SHA-256: 86117be34db5db1e69de274a5211324683b658730c127efad0b991a33ff1f381
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Hd movies bollywood 2015' and the malicious URL, suggesting a lure to a link farm. The presence of many external PDF links further supports the link farm characteristic. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=hd+movies++bollywood+2015
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_23cc281dbdae4dbdbe34c9fb66888ff6.pdf
    • https://static.usrfiles.com/ugd/3794ad_6ba658d4970341b78e716fb11d20aec0.pdf
    • https://static.usrfiles.com/ugd/cafc24_d4a6bccda7d5438eb4a5ca79f2410420.pdf
    • https://static.usrfiles.com/ugd/fe83c3_098fe91e63b747cb9f9246e295c371ce.pdf
    • https://static.usrfiles.com/ugd/eeb7bd_62942846e96240efadb5ff1b1631feac.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/timedowo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/bejenaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/rotumiwodoniwiwinox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5175/files/lorapolazifuvubusif.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6690/files/impossible_quiz_level_20_answer.pdf
    • https://cdn.shopify.com/s/files/1/0437/9253/1617/files/operational_amplifiers_clayton.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/tagexofeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/escala_cromatica_de_clarinete.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/aprilia_tuono_v4_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/velelemaparosibebuxuf.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095e9.bin
75962aa8ee8735d67871a0dad81161037087739848fe345b0e9b4f54773fd3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E9 5472 bytes
font_01_sfnt_off0000a898.bin
50a0de5d481d342b62be4c9a1dd5917a9302f0df06da63449ca89b6db1832fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA898 10420 bytes
font_02_sfnt_off0000cc5e.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5E 16164 bytes

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