Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c87516f6203352…

MALICIOUS

PDF

46.5 KB Created: 2020-08-07 06:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70b081341fb6b2e12233761efaafd491 SHA-1: e242f5bfe1e7f9f0ab4a10d91963d211cac2e8d2 SHA-256: 08c87516f62033520e15b2e5d731b20b194ca36f5c2a1c357d7478129e198669
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body also contains the URL https://ttraff.ru/pify?keyword=benim+hocam+kpss+t%25C3%25BCrk%25C3%25A7e+pdf, which is a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many of which point to potentially malicious or unknown domains, suggesting a link farm for SEO manipulation or malware distribution.

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/pify?keyword=benim+hocam+kpss+t%25C3%25BCrk%25C3%25A7e+pdf
    • http://files.hammanrealestate.net/uploads/1/3/1/3/131380008/supebukejisada.pdf
    • http://files.waimariehvcroquet.org/uploads/1/3/0/7/130775949/fuwimakubavudovej.pdf
    • http://files.cocewl.org/uploads/1/3/1/4/131437318/xuduju.pdf
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • http://files.oceaneyessupply.com/uploads/1/3/0/8/130813427/pumipozosamava.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/mathematics_worksheets_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/vupafavabafudasakigad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/nudutejawuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/jeginuseb.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/meditation_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/guzif.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/ketikiniwavujesezareb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/jusasusukenimaxaxol.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/lodatikuzakowezavege.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/vopaxopoguzadexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/case_files_obgyn_5th_edition_free.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_off00007388.bin
414a23218d1860c4c773e1c2b5fd6d0daf32af3677d2e77273d9de61c20981b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7388 5780 bytes
font_01_sfnt_off00008690.bin
d60176b3df2dd52a518fad6ebe6b31c17c5a2b75562f810e22114c062e436aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8690 11476 bytes

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