Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cadf6b3badde98…

MALICIOUS

PDF

37.2 KB Created: 2020-08-13 10:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7a515267af15d2b7c010f5d33b121a4 SHA-1: 13c1be9e2254dfe95d22267ef4f9db2afe42823f SHA-256: 14cadf6b3badde980c450cbf998488b91a906e0efd5717ad166235d054e52252
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary link identified leads to a malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body itself contains obfuscated text and URLs, further indicating malicious intent.

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/wb?keyword=ejercicios%20de%20williams%20y%20mckenzie%20pdf
    • http://kutok.theyeyechampionshipleagues.com/uploads/1/3/1/4/131406082/nemimar_wifew.pdf
    • http://files.modernmatrimonydesigns.com/uploads/1/3/2/3/132303310/turapemupirew.pdf
    • http://vifizate.byhyu.com/uploads/1/3/1/3/131398455/wizune-menofarix.pdf
    • http://files.quasar-resources.com/uploads/1/3/1/8/131871583/5853876.pdf
    • http://files.eldiablo.ca/uploads/1/3/1/4/131453897/662a987969dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8613/files/is_range_inclusive_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/59740033689.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/12_angry_men_sparknotes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/duluwedabipiwemosabeleso.pdf
    • https://cdn.shopify.com/s/files/1/0431/1082/6146/files/learn_python_the_hard_way_3_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/codeware_compress_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/fap_titans_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/ffxiv_act_install.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8088/files/kevilebanadirubavatu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/42928802423.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/calendrio_de_vacinao_2020.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_off00004e81.bin
35cbe7532238160637392aeb6b53f4622d476d8574cc9a7dac57855676b71e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E81 5644 bytes
font_01_sfnt_off000061c2.bin
a1299a6b232f939d02e1738cea2a3da46a5f25e08e371103f5654fcf13ad447c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 11072 bytes

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