Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d02c6f026ad3006…

MALICIOUS

PDF

72.5 KB Created: 2020-08-31 10:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea3ba2971381acf65a05ff9d3a5f7cd0 SHA-1: 405e73ceb9c8acddbac376fa5a708eab7afc3051 SHA-256: 1d02c6f026ad3006dc68a8290d6b4b059c50ecc43070d15125513ab37484246f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The primary malicious URL, https://ttraff.cc/wix?keyword=%25D9%2586%25D8%25B3%25D8%25A7%25D8%25A1+%25D9%2585%25D8%25B9+%25D9%2586%25D8%25B3%25D8%25A7%25D8%25A1+%25D9%2585%25D8%25AB%25D9%258A%25D8%25B1%25D8%25A7%25D8%25AA, is designed to redirect users to potentially harmful content. The presence of numerous external links, many pointing to static.usrfiles.com, suggests an attempt to obscure the final destination or to generate traffic. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=%25D9%2586%25D8%25B3%25D8%25A7%25D8%25A1+%25D9%2585%25D8%25B9+%25D9%2586%25D8%25B3%25D8%25A7%25D8%25A1+%25D9%2585%25D8%25AB%25D9%258A%25D8%25B1%25D8%25A7%25D8%25AA
    • https://static.usrfiles.com/ugd/77d535_3f053ac5e09e4e96a221b0275be8238b.pdf
    • https://static.usrfiles.com/ugd/6908d7_9743e80c585e49189a036885f46a64b3.pdf
    • https://static.usrfiles.com/ugd/87fdc7_cb68b0e6901f469ea04ff2d4b13e3d30.pdf
    • https://static.usrfiles.com/ugd/c1615c_93dde386ece7440d9619fc7125959781.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0433/6890/6906/files/zojoso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/trastornos_alimenticios_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/ridolatovewibijo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2806/9017/files/alternating_current_machines_by_puchstein_and_lloyd_free_download.pdf
    • https://static.usrfiles.com/ugd/67f5f7_c7fdc1041a874db8844ae8c251beaad0.pdf
    • https://static.usrfiles.com/ugd/9e41f0_b16af5483b3b4a7db17474ef7372b2e7.pdf
    • https://static.usrfiles.com/ugd/12f4eb_d0acbcd2116041bf9610598bc0e6d22a.pdf
    • https://static.usrfiles.com/ugd/b8c837_382e334395aa4a4f8bcb044adaced5c0.pdf
    • https://static.usrfiles.com/ugd/e643da_9602d7ec893b41ffa0af2f3860fe411d.pdf
    • https://static.usrfiles.com/ugd/b8c837_23bc1e9f24024887a160d64430be2cb8.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000db21.bin
eed605211fb7531e1e293d53c28bceec0712b57f9693b021936e0b21e21b57f9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDB21 31768 bytes
font_00_sfnt_off000092c4.bin
6bef2d0f225a5df6dad72f6f637ee5eee4959edef2334b1b770f90f73ac79a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 4068 bytes
font_01_sfnt_off0000a0a2.bin
88265ce64a2dc0e556ec791532a32bcb3568ef4c9d4e5bb539c97606ee9e3c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A2 17268 bytes
font_02_sfnt_off0000b9e9.bin
31b27d457f7f30ff725f409617d0c98b4cf9d90b4ea89a41dd2edf978d2c1ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E9 9660 bytes

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