Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6107449f8d1ce96…

MALICIOUS

PDF

74.4 KB Created: 2020-10-27 23:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0dd3901bc721a7fa70effa252303a39 SHA-1: bcb29e84638deed73cd2e89e2bcf694b53106c69 SHA-256: e6107449f8d1ce96900aed3006f5453e6a1977addffee6e222610a3814c57271
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to appear as a download for 'black ops 3 dlc weapons'. The ML classifier strongly flagged this PDF as malicious. The presence of multiple external PDF links suggests a link farm or redirection strategy to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/123?keyword=black+ops+3+dlc+weapons
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8b58dc88643.pdf
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5f95ec58ca807.pdf
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8b40340471d.pdf
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f8aed684de1f.pdf
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f9780d4b9687.pdf
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5f93bfb9d7f39.pdf
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/6973011.pdf
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/sigiregotozu_pomavibedided_peluwozoku_sesefew.pdf
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/c99331f2d4.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.pdf
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/3347896.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tadovu/c_major_chord_piano.pdf
    • https://s3.amazonaws.com/juduk/15113316151.pdf
    • https://s3.amazonaws.com/gulapore/vulunewivodagutigatazati.pdf
    • https://s3.amazonaws.com/tulosa/clinical_approach_to_anemia.pdf
    • https://s3.amazonaws.com/subud/away_from_home_american_indian_boarding_school_experiences.pdf
    • https://uploads.strikinglycdn.com/files/5d853479-dce3-41f6-bd05-a05ea35e471b/vigonigutulotuwe.pdf
    • https://uploads.strikinglycdn.com/files/eea84e9e-3c22-4a6b-912a-567f23a99f6d/xemaz.pdf
    • https://uploads.strikinglycdn.com/files/bf585559-2744-4345-8693-951f682aeca1/mivelitigelokoserigaraku.pdf
    • https://s3.amazonaws.com/tadovu/zugopesesiduzano.pdf
    • https://s3.amazonaws.com/zazelujeju/21145452090.pdf
    • https://s3.amazonaws.com/bizamesuwepe/anabasis_greek_text.pdf
    • https://s3.amazonaws.com/zetare/lipid_profile_test_in_hindi.pdf
    • https://s3.amazonaws.com/tetazino/90494897563.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d62c.bin
412f594ab81d825cfaf552bdb7251150d7b298586fa13ae9423eadaed65b65c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 5000 bytes
font_01_sfnt_off0000e73b.bin
060f51802a68de75876a71467168874707a4e826c70959e65e936d3a517b2382		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 10972 bytes
font_02_sfnt_off00010c25.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C25 4324 bytes

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