Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ad7a825d98b8bf…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 09:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79aa8172a81893f05a09958d48dde179 SHA-1: 657ffd6c1e8925339f70dc0c04678694b81013f5 SHA-256: 07ad7a825d98b8bfa1e981f0535ffd6a276bb799ed66dc483f49784a9dc55e68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Neuroventas Jurgen Klaric' and includes the malicious URL. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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/wix?keyword=neuroventas+jurgen+klaric+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/mofofurokiwoxusip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/ammonia_in_wastewater.pdf
    • https://cdn.shopify.com/s/files/1/0430/8860/9429/files/13060181811.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/english_course_book_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/devutatotir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/koxemoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/vemetezofutujenof.pdf
    • https://static.usrfiles.com/ugd/36f25b_0507dfee9ee74250b65ec0481cc0c1a4.pdf
    • https://static.usrfiles.com/ugd/0b46e6_883529355d0148aeaabd160c11fefb3b.pdf
    • https://static.usrfiles.com/ugd/ad2ade_38684aac09ca426995cfc9eb7be1fc36.pdf
    • https://static.usrfiles.com/ugd/b8c837_11379d7a8890430e905fed50481531c0.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/41065067141.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/the_brothers_karamazov_richard_pevear.pdf
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/33460831758.pdf
    • https://cdn.shopify.com/s/files/1/0464/7613/2502/files/40267236970.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/movie_theme_songs_piano.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_off00006e7a.bin
b8ef2eb02c3f0d4f3ae4fc60d740161bca2d3f2dfb13ada486cae9d0eb9c9f93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 5492 bytes
font_01_sfnt_off00008148.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 1800 bytes
font_02_sfnt_off000089d6.bin
9e535d65cb1199ee3f3626b6f2560b739091ca73a9ffd839ab49bb808ec236b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D6 10376 bytes

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