Malicious PDF — malware analysis report

Static analysis result for SHA-256 827060c1a0703f33…

MALICIOUS

PDF

33.9 KB Created: 2020-09-08 14:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 926073d79b1b3d3dd4790d21c1fc0f64 SHA-1: b094c851958deeaab5d4404a451fcf57e43782fe SHA-256: 827060c1a0703f3335cb09a0c38762523827aa866e7efc21db047a421b6b99ec
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, includes the URL https://ttraff.me/wix?keyword=motu+patlu+cartoon+hd+video++2017, which is likely used to lure victims into clicking on a link farm of other PDFs. The presence of numerous external PDF links suggests an attempt to distribute further malicious content or lead users to phishing sites.

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.me/wix?keyword=motu+patlu+cartoon+hd+video++2017
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d54300_8a3a65ac944c4169a87263396bfae8aa.pdf
    • https://static.usrfiles.com/ugd/d4da64_af9ed81c4bc34b01bc5405ff509fcdd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2a6b509b4aa4e8f9cbc3fd8b936a2cf.pdf
    • https://static.usrfiles.com/ugd/ecec20_b41ce83afb2b4f5f864e60a82f627f1c.pdf
    • https://static.usrfiles.com/ugd/ac51ce_c5d9b6d59fa9475e9dbd1df3680094d3.pdf
    • https://static.usrfiles.com/ugd/3e5db3_b1c350e5151049bd845b01ffb499079b.pdf
    • https://static.usrfiles.com/ugd/edb4a7_1c6cc2b05ced444e9fc632ca519bffab.pdf
    • https://static.usrfiles.com/ugd/911c12_cc9f2d07d6af42a09e1b122cab04b734.pdf
    • https://static.usrfiles.com/ugd/4b7290_0097a631a88c45199c3fb3de8d8198d3.pdf
    • https://static.usrfiles.com/ugd/270e53_34371019c49d4dd0a59298bf8ced947a.pdf
    • https://static.usrfiles.com/ugd/0c4177_742853ce697a4924a2363f9abc92a491.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ef5ad615cc40d399cde0dc95359476.pdf
    • https://static.usrfiles.com/ugd/2b3f46_205aa52ba99b49bcac8c57e60ef9f420.pdf
    • https://static.usrfiles.com/ugd/3bf302_8bcffb6dd88849f6b1a45a7d3c23c2d0.pdf
    • https://static.usrfiles.com/ugd/39cb9d_b6432e78a2114ac1a83c4ab0a4673ebb.pdf
    • https://static.usrfiles.com/ugd/078c79_079d8bb4dc4844c6a1acbb9b29f5fa6a.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_off0000473b.bin
2f1e2eccbd75b3b1577a648062449dbf804cf80c8f994164af2e1536c8e951ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x473B 5456 bytes
font_01_sfnt_off000059dc.bin
bbaaf107577c895fa502cfde140ff62dbfb106034f10aa9e0c5f0f16a8878265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DC 9612 bytes

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