Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e51cbbff8fa38fe…

MALICIOUS

PDF

50.7 KB Created: 2020-09-01 10:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6502f3a68691d2c06247e209ff5a1e6 SHA-1: 17dee5b58e427eb4efd547231771fd82d178e386 SHA-256: 5e51cbbff8fa38fe268f6abf42646052dafaee238cc458b7052eb5b71d8ae2b4
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a movie title. This is a common social engineering tactic to trick users into visiting malicious sites. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL supports this. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wix?keyword=anamika+the+untold+story+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/eb6612_5fdfaf3202874ca781f4cffed5aefc95.pdf
    • https://static.usrfiles.com/ugd/906e9f_82f5e3d567824666a49b7ee50dc56426.pdf
    • https://static.usrfiles.com/ugd/08fe48_5f9ce33d0d1c404fb4b234a29d22c846.pdf
    • https://static.usrfiles.com/ugd/15cd4d_3f4056e5c78e4734bd2592755dbd2189.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/defesater.pdf
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/sopike.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/php_copy_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/85621996737.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/miletasatulig.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/77875716439.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/around_the_world_in_80_days_by_jules_verne.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/nuwoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4219/3058/files/91041625948.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_2b0a8f65d3a54570b48e4721822d8afa.pdf
    • https://static.usrfiles.com/ugd/0a593f_b48d15d6c97b48d6886055107e4b2d5c.pdf
    • https://static.usrfiles.com/ugd/e1c37d_07114fe3a00a4e3aacc7d6f7fb29f842.pdf
    • https://static.usrfiles.com/ugd/b42fd6_ced054fe599d42e0a5560ddb8d69c6f6.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_off00006526.bin
7efa2ea69eb253122e1eb5a250d2d557591e9851493f1e946e47542fb6e23973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 5360 bytes
font_01_sfnt_off00007744.bin
6dcf30959028956838b68e3beda916b53771c924e974ab9411565642f91f51aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 10172 bytes
font_02_sfnt_off00009a4b.bin
b8a5512bf6170e98a959bee37619ad8c6240580fb674f888bfb53b79bcf19cc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4B 16484 bytes
font_03_sfnt_off0000b101.bin
cc55d4bfd0841abf634885e534b9a653288d8a930147f2a40842ef5720712448		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB101 3000 bytes

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