Malicious PDF — malware analysis report

Static analysis result for SHA-256 07518b66aed6caaa…

MALICIOUS

PDF

51.5 KB Created: 2020-08-04 18:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50134016f68d695288755180349e05c7 SHA-1: ee06ffa72ce6140a82f8204504d719f1d9b7b055 SHA-256: 07518b66aed6caaa4b2bdef6fedecd9144ba1d5b91fc82984a4809b09179e9e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body itself contains the URL 'https://ttraff.ru/pify?keyword=cartel+definicion+pdf', which is likely intended to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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=cartel+definicion+pdf
    • http://files.jsnobles.com/uploads/1/3/1/4/131453902/1414155.pdf
    • http://files.samsaraholidayhouse.com/uploads/1/3/1/8/131857756/biwenijuwesuzi-kobonaredapir-gexodetopama.pdf
    • http://files.ashliesart.com/uploads/1/3/0/7/130739146/792edad.pdf
    • http://files.brooksidestables.com/uploads/1/3/1/6/131607544/losakov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/indeed_resume_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/fowitopiliteri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/71638983899.pdf
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/gosezawodobuxez.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/77242297162.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/faa_8050-_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/85470802338.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/neliloxetewonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/pofawekaxizakiges.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/vorokitabatorexemagifeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/chicken_egg_production_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/84232647390.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_off00008c93.bin
722d29e82c9c44d70bcb795316f6f33a01c5abdb4f7958c8439dfba53ee7d019
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 4876 bytes
font_01_sfnt_off00009d3c.bin
cc33cc5b9768148dc891002ac79cb63d6510d77aa8aaf76676c7056369715b76
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3C 10576 bytes