Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b17902ad5b76b04…

MALICIOUS

PDF

65.9 KB Created: 2020-08-30 20:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9859bd65ed042c74d2132072b302899 SHA-1: 955e37d7731dc3a60ef901e07322c8d36465da0e SHA-256: 0b17902ad5b76b0406fca71bdd3772131842ce1a37f9544eab15297d9645f9d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to manipulate search engine results or lure users to malicious sites.

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.com/wix?keyword=taimanin+asagi+chaos+arena
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/foxomom.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/18163190815.pdf
    • https://cdn.shopify.com/s/files/1/0463/2949/5713/files/foputaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/telkom_catalogue_august_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/kopiwogesaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/mick_goodrick.pdf
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/the_compact_bedford_introduction_to_literature_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/komovizonigelutotu.pdf
    • https://static.usrfiles.com/ugd/2c8d66_ae0c4740e64e4e43ba4cb1e7b85e53f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2c7ec019d1240dc8bf1d6f825b46b2f.pdf
    • https://static.usrfiles.com/ugd/565485_c482f950082844189e1066877104f5e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd7f959713c04472ba243d38c7b5edcd.pdf
    • https://static.usrfiles.com/ugd/0d9a50_e13ad3537eba48d5bbb5753dd93e5353.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bbe.bin
7d81837ca2bbecc9acab346dde2acd165e91ffa2a338fa351e5a6fd810bd255d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBE 16440 bytes
font_01_sfnt_off0000b065.bin
848df26c14ec110337120df30feb4a9c13520acdec03557d5a9fd84d516318d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB065 5128 bytes
font_02_sfnt_off0000c1a5.bin
de9a32f384a2a13f47110bc7b93266f135bc2dcaca4a01f643166f8bf370a59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A5 10416 bytes
font_03_sfnt_off0000e544.bin
1a51fac5cecc05d5f0a5d3b698ffe240ccab470cdba6a823ba27c6c2a12c20dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.