Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34151e9f65e9d75…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 21:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1159fa6e4e3ad1e467558fa598f85ba SHA-1: 78af50f8ff45ba7786c72a31be1045f470526baa SHA-256: e34151e9f65e9d75854f793b3e8ec20e7f31dc8132cd9220e0ba00762558bb4b
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to converting PDF images to JPG and includes the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, leading them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=converting+pdf+image+to+jpg
    • https://static.usrfiles.com/ugd/b58d21_35654c323e5a441fb6e2c0e3b74d1da2.pdf
    • https://static.usrfiles.com/ugd/b8c837_31b9de4785a74f6d8c7e70ad1ce593df.pdf
    • https://static.usrfiles.com/ugd/24853a_ba726eb2c60d4907bfff773b84095696.pdf
    • https://static.usrfiles.com/ugd/b8c837_d09ffebd3a0548338f097d7359f8c037.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffb3c0af041040bc9a71bebce3e967af.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/d_d_3._5_underdark.pdf
    • https://static.usrfiles.com/ugd/defdb4_0a93e6a3c6634bc78101e28827c00630.pdf
    • https://static.usrfiles.com/ugd/b8c837_d285b2b1bf37464883ec5f8cc74b1f3d.pdf
    • https://static.usrfiles.com/ugd/868401_8e8d9a5b1ec14a73a64210e8427507d2.pdf
    • https://static.usrfiles.com/ugd/5438e3_7082c4d59367422987990ed0ce139bf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc094715d9b24a4fb7148df98740b45c.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_off00005adb.bin
9a72df59fce28397385dfa43adf2004e47ea4256a1a9e26b2e2c87d190f7fe94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADB 5096 bytes
font_01_sfnt_off00006c2e.bin
779ea695255705a588f7a42961b77a018474961f88d0390b6e85f98b6cd7a18a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2E 10356 bytes
font_02_sfnt_off00008fa7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA7 4324 bytes

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