Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bea4ce4927a62c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 22:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbea10a15a17458fd4b81ebac9ff3926 SHA-1: 318696f9f0abd8b1d1564942eb8fdcade657dfb5 SHA-256: 23bea4ce4927a62cbb7530b98fa2e394d15b82798c169d3685a4bec60c37386d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to 'fnaf texture pack 1.13.2' and embeds a link to a known malicious redirector, ttraff.com. This redirector likely leads to further malicious content or exploits. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to manipulate search engine results or distribute content through a network of sites. The ML classifier strongly indicated maliciousness.

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=fnaf+texture+pack+1.13.2
    • https://static.usrfiles.com/ugd/b8c837_290d54144b174b43aeab491724715e4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_165550fb41434e53b50c5e88d018a5fe.pdf
    • https://static.usrfiles.com/ugd/8a419d_acce93fcaa22400792e30b1cecb2cac2.pdf
    • https://static.usrfiles.com/ugd/a31856_addf721be54a401d82c8b6b150d1e7a1.pdf
    • https://static.usrfiles.com/ugd/79e5df_6403637f3967437ba6b6c6f1b989d5dc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zobalujewaxij.pdf
    • https://cdn.shopify.com/s/files/1/0450/4836/5214/files/addition_and_subtraction_of_polynomials.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/tufujozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/suvomajinoduk.pdf
    • https://static.usrfiles.com/ugd/74e905_eee6d0f0f32248d88912a0d02375e104.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_ebcd5108416949cfa3e41a1ee9d701b4.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_29e222167d364487b92e0bf6b635e69d.pdf
    • https://static.usrfiles.com/ugd/b8c837_64e22d33b8e24ab081d2ae50c4621a43.pdf
    • https://static.usrfiles.com/ugd/10e3af_a39376bfd60f498390e8936a571bdc67.pdf
    • https://static.usrfiles.com/ugd/dcfb95_f691e0d451e54935a4a37713bd77f880.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb4d0b3c08ad49eab3d4c4a0914c1d7e.pdf
    • https://static.usrfiles.com/ugd/1849a1_be9863c7090c4104b0ce30aa7408d62a.pdf
    • https://static.usrfiles.com/ugd/2ac701_adaa0eb6dba246c7b9dfe011fe97a16d.pdf
    • https://static.usrfiles.com/ugd/9cc572_b171b758d3eb46b394ca837927de7e85.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ba.bin
5b089a205a2063e9260131a013db96e63fbaf6326c6aa94c3d68fdcd20d7d079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BA 5264 bytes
font_01_sfnt_off000065c5.bin
2d2f8697bca906cef2a1bcb524f09b6b5d3dfed54c7ca1346e3fb27d65172dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 9748 bytes
font_02_sfnt_off00008750.bin
9b78b915eb75ef0aea6965a6113565ca1bcac7735c766488ce9f12ff332a71b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 16064 bytes

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