Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6da0ef3d2aa1ed2…

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 01:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be2150997e90caadbaf11f1daab9d17a SHA-1: b0275249841f294b3afe5ebe593dd6ad21819e9e SHA-256: e6da0ef3d2aa1ed270191e589a137651121c6ab21508fa9af1ee8c671ebd4449
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or redirection attempt. The document body, though partially corrupted, contains text related to a fishing report and a URL that is also flagged as a malicious redirector. The ML classifier strongly supports the malicious verdict. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/wix?keyword=herrington+lake+fishing+report+2018
    • https://static.usrfiles.com/ugd/7ea8bb_88df5de83c034c8fb21a3b6fbc99e521.pdf
    • https://static.usrfiles.com/ugd/de65f7_c7c2ab2810c2414d99a9fa67a787a44c.pdf
    • https://static.usrfiles.com/ugd/47b1e8_ec21db9769c6426e92ea4f1ec3b83a47.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/brother_hl2280dw_driver.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/30650660855.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/kegoridapolezejafijavugam.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/56219266111.pdf
    • https://cdn.shopify.com/s/files/1/0446/0979/8307/files/accident_report_writing_training.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/asana_change_project_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/welirexekivas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/bluetooth_chat_app_android_github.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_off00005cdc.bin
e2b222267fed9e6fd9af0b200a6c621621cbdfbcf83590df8df7f6fa2f1d4415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5708 bytes
font_01_sfnt_off0000704f.bin
99ae71f06daf5f4185975280acaedf9e35c5b5ec3a659436693bab8fdea99d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 10784 bytes

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