Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ee900f6b497699…

MALICIOUS

PDF

80.5 KB Created: 2020-08-21 23:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 882c9a42bb23f56323dba38ec672566e SHA-1: a2b5c9cf4bdf77654076077f345c6112cdef62b7 SHA-256: 84ee900f6b497699c90dfac310a05f929031eb917afddeece857d298ff7c7690
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for 'movie songs', and the presence of numerous external PDF links points to a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=annamayya+movie+songs++free+in+telugu
    • http://files.rosesfloristbiloxi.com/uploads/1/3/2/7/132712451/juzejen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/786322541.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/gimivovumenagewa.pdf
    • https://cdn.shopify.com/s/files/1/0466/2630/8261/files/betawuvafefuzimixapes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6766/files/athletic_body_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/9607452788.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/tuduzikiligadubunerakefeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/9287/7217/files/rofaxabuzaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/bsc_physics_syllabus_sambalpur_university.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_off0000f6ba.bin
c774576b8bbba72de4ad39289f842fe53f32ed2b0cf3fd9298688f8dd5a0d66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 5236 bytes
font_01_sfnt_off00010886.bin
a6bf0970373d4159ae36b38b7288b563297cb908d9cace3c74e80e43ac6d027c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10886 14536 bytes

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