Malicious PDF — malware analysis report

Static analysis result for SHA-256 68539533099fe817…

MALICIOUS

PDF

55.0 KB Created: 2020-08-11 19:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd7193004085f06cb7d0c98899c53f39 SHA-1: b38c02b019be98fecc28bc76590ba45c585bec75 SHA-256: 68539533099fe817b38fa844365127ede0f148fe406a654db28602b32f683ab9
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, masquerading as a file conversion tool. One of these links, 'https://ttraff.ru/wb?keyword=como%20converter%20arquivo%20pdf%20em%20imagem%20jpg', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest a phishing or scam attempt designed to redirect users to potentially harmful content.

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/wb?keyword=como%20converter%20arquivo%20pdf%20em%20imagem%20jpg
    • http://files.wfut.org/uploads/1/3/1/3/131379312/lonudobet.pdf
    • http://files.janecaldwell.com/uploads/1/3/2/6/132683330/maviva-ruxewib-nokonovaxekil-lopogixokapawid.pdf
    • http://files.ameliaandcompany.com/uploads/1/3/2/6/132682233/togosijorogabikikal.pdf
    • http://files.irieiwaforstudentsinc.org/uploads/1/3/0/8/130814900/tixavi_degujomemugori_kujapapube.pdf
    • http://files.ibnsinagroup.com/uploads/1/3/0/8/130873794/2155159.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/wazuponik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/kutukaluminukijobunub.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/43533182240.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/63163811503.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/42686415391.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/lunejovotoraluvugowopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/cornerstone_chords_e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/westworld_black_hole_sun_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/tonujuwopebumiv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007193.bin
57664ab3d9aa2ca317dd896cd8a0a2018f0f372d7e8c573d5fa8b69d978ee621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 5432 bytes
font_01_sfnt_off000083f8.bin
efad70ea9abd56ef9649dcc3097e643f7169f8c383ea5e4bd4cd2a3159a1df2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F8 12316 bytes
font_02_sfnt_off0000a97b.bin
ac562fa2c037d8dcff1fcd6e6f1f7a24cfc2bf7614a7cfe389b5b56a27969dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA97B 16204 bytes
font_03_sfnt_off0000bebd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBD 4324 bytes

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