Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed960e0e53a3c8…

MALICIOUS

PDF

44.0 KB Created: 2020-08-18 16:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e66e2993d530e6192c795231643bda SHA-1: b838ce512de838a9577eb5268e5be521118f5c93 SHA-256: 09ed960e0e53a3c890cedd09bcfe858b0b9fa7abfa8650c5776fbc38f48553fc
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is an 'annual report' and includes a URL pointing to a redirector. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, many of which are likely malicious or part of a link farm. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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.cc/pify?keyword=florida+profit+corporation+annual+report
    • http://lakarote.the2hraquarist.com/uploads/1/3/0/7/130775971/wufamiwabuj-xulovom.pdf
    • http://files.georgia-bates.com/uploads/1/3/1/6/131606465/5382600.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/sajuxinaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/47310442449.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7125/files/calendar_template_free_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/13942987003.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/tebejin.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/a_view_from_the_bridge_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/convertir_de_a_word_online_gratis_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/10676191174.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/98348155015.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/56005423022.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/zuxuwar.pdf
    • https://cdn.shopify.com/s/files/1/0436/6227/8809/files/buzuxutora.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/xunekukalawobaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5522/5763/files/teeter_ep-_560_manual.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_off00006e2e.bin
2475e9acd09d6d6a68b8e9f724aaa9b2b03921030b7a05751fc67b648904fbfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 4924 bytes
font_01_sfnt_off00007eff.bin
97d857765cdc1243d07bb09b6320e9e6dcf2c864a83c492ccedc637ac9286df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFF 10692 bytes

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