Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e823eea0eb678bf…

MALICIOUS

PDF

37.3 KB Created: 2020-11-02 02:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f5e5cde2a66a8b6a39c151172424426a SHA-1: 3a72ffccad3c34e0fbe0d4315bd02544a9f4efc3 SHA-256: 1e823eea0eb678bf177e7d48510afb17560087c1b286315ee7513f8eff5e553c
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting a phishing or content-scraping lure. The document body text and embedded links are designed to mimic search results, aiming to trick users into clicking the malicious URL. No scripts were extracted, but the presence of numerous links indicates a high likelihood of redirection to malicious or unwanted 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.me/pify?keyword=umass+dartmouth+address+and+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f9a5b8904a3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/29081720289.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/6th_grade_saxon_math_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/brevet_2019_sciences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/encyclopedia_judaica_vol_6.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/333_area_code.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/cantos_para_difuntos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9466/5125/files/xotox.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/hp_pavilion_15-au062nr_battery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3141/9806/files/pdf_utility_pro_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/sum_in_python_for_loop.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/computational_complexity_christos_papadimitriou.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/ferujonebuxasufe.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/law_on_obligation_and_contracts_reviewer.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E1 5300 bytes
SHA-256: 0e0d5b9cc19c689ed1d35d5a9fadbbcc828a85b6768b5112acf3e7b34978ccdc
font_01_sfnt_off000065af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 10096 bytes
SHA-256: 37496c56007db328160ac4e7f244156b42eb5dd266ae60266ab1de23c2e19f19

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