Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f585b972dcd07e…

MALICIOUS

PDF

79.0 KB Created: 2020-08-21 01:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92091eae39718e6d9027e3000f719b27 SHA-1: 3507066f754ca32a208cd5ac953bc8d387bdc6c2 SHA-256: 69f585b972dcd07e575107cd33e0d1929bc65edde707ee56371924954ba36fc0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains text related to 'National defense authorization act 2012 pdf' and the malicious URL, suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious nature of this document.

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=national+defense+authorization+act+2012+pdf
    • http://files.quinta-milhafre.com/uploads/1/3/1/4/131437822/xizanenuf.pdf
    • http://files.melissahillart.com/uploads/1/3/1/6/131606206/3345685.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/3760/3478/files/wufitokalezujasut.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/agriculture_books_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/88624312266.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/vmdk_to_vhdx_converter.pdf
    • https://cdn.shopify.com/s/files/1/0430/4502/7993/files/jodomamogodutoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/logofokekopubalixaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/zadenoteniwegiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3653/2136/files/similar_image_search.pdf
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/score_match_best_formation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e917.bin
2471bc93cc96a1249fb7f36b89c6aa0f987424ce6650f42d7addfa268e4d446e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 5472 bytes
font_01_sfnt_off0000fbaf.bin
147e046d8f71cf46fea95032edfbe464d15d402897c968ed7957d99005f0152b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 10876 bytes
font_02_sfnt_off000120e2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x120E2 4324 bytes