Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e88f3df0d997b5…

MALICIOUS

PDF

53.7 KB Created: 2020-08-31 09:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97b3329db8a20e263a923c63ce21681d SHA-1: e174987307d08f876194c80760b0d17c15b33ab3 SHA-256: 41e88f3df0d997b5b92856aef2cfc91e7ba6118a71cd8847e7d002f9a8cfbd41
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=the+little+mermaid+vanessa, which is flagged as malicious. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/wix?keyword=the+little+mermaid+vanessa
    • https://static.usrfiles.com/ugd/0baf77_8578e65b1e5e4760a85f3407dc420e94.pdf
    • https://static.usrfiles.com/ugd/f84671_fa5f77912ab44497ad1db32d69f77b99.pdf
    • https://static.usrfiles.com/ugd/b8c837_525eb7ff9f524104a67912ea57094c03.pdf
    • https://static.usrfiles.com/ugd/bfbc46_88ba72fe61ba44f2923d9509240962fd.pdf
    • https://static.usrfiles.com/ugd/32acb1_c7fef8fdc7454e0e887ce71d12bc4e35.pdf
    • https://static.usrfiles.com/ugd/5a1791_5f7ad4c991884f44aeb2c2e8b89429b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_58aa754cda854bb7a435b4f1393cc8ef.pdf
    • https://static.usrfiles.com/ugd/b11f6d_c0aff8a4cbb946bdab8ecb5c4f810b61.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/xejupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/misumuzipetegaxapazipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/linear_polarizing_filter_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/anesthesia_types.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/devil_may_cry_5_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/fukubijutadutoxuxozetex.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_off0000970a.bin
219e2699769544718f7fe8718c3567c59f51a3450424f077f6a3d1b4b185d36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970A 5076 bytes
font_01_sfnt_off0000a824.bin
c40f3b308b49282140fa30b09ffe60ccbbc51aca26df557af0f7fb5ccfed491a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA824 9904 bytes

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