Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a60012277b6a10…

MALICIOUS

PDF

39.2 KB Created: 2020-09-06 14:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 133f0724a6583fb1536efd92ccaa08b6 SHA-1: 6097a986c84ba228750a112341e2a8b7f49e9828 SHA-256: c6a60012277b6a106f851d2ea69617e50893a8ebf86862843315a70fe8265bc5
152 Risk Score

Malware Insights

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

The PDF document uses a lure of 'New tamil movies 2019 free hd' to entice users. It contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/pify?keyword=new+tamil+movies+2019+free++hd'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive document, leading to a 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.club/pify?keyword=new+tamil+movies+2019+free++hd
    • https://static.usrfiles.com/ugd/2e79a6_60e212dacb3740479e5ada6c07e672fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_47290f84890a4e0d8e292dde9666bc21.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_dcc28762c78e47e4a6b90ec5fc67f5e7.pdf
    • https://static.usrfiles.com/ugd/29c71c_2a52237433c84ca0a94cf71f653c26d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c5d0e8ef8cc449fb11bb7d577dc25a8.pdf
    • https://static.usrfiles.com/ugd/33a16d_aae813b504d14abd8897049b06cc34e4.pdf
    • https://static.usrfiles.com/ugd/83e24f_31199ec3c5a44c45a6a49854c5050cc2.pdf
    • https://static.usrfiles.com/ugd/a4d998_e7f121fce58a44d0aabf10814e3f44b4.pdf
    • https://static.usrfiles.com/ugd/5899d5_30ca4e40d92f4d229821d62122ac455a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058bb.bin
733f403e2705471d158eefe434445a921f2d2f7ce04ae3ac3756d17f6eeaf16a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BB 5752 bytes
font_01_sfnt_off00006c3d.bin
b4dff0e1acda3cd139256629275d8c37356b9311c378f524c15648d74d3a3f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3D 10668 bytes

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