Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef82b1417f68fffe…

MALICIOUS

PDF

46.6 KB Created: 2020-09-02 06:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 930487c3ddc04b1deac5e4a421585a5e SHA-1: c83c3be4b43191e8abc1da04ec77b8a075b7a490 SHA-256: ef82b1417f68fffecf7793ac821bf4538088b84e62f0424c9ce2b25026b7454e
120 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 infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=maalox+fund+fact+sheet', which is flagged as malicious. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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/pify?keyword=maalox+fund+fact+sheet
    • https://static.usrfiles.com/ugd/b8c837_cc22890e19354a8c95a814f9dc2f3ac0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3bb013c06c34e6aa3ca6e2b8b29ce4d.pdf
    • https://static.usrfiles.com/ugd/911c12_044f51c1effc48b8860deca97d4e6558.pdf
    • https://static.usrfiles.com/ugd/52b593_87d3bd5963e043ecb27f720cb07051fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_46fcd9b0a21a4915936cc0e767b0b75e.pdf
    • https://static.usrfiles.com/ugd/11f207_69091fdc843a4d21a7f3fd7758bc5793.pdf
    • https://static.usrfiles.com/ugd/0a0016_eaac56ef236a4db5a43af4e37c79bf35.pdf
    • https://static.usrfiles.com/ugd/784815_aa22bf8355da435f8113e829bcfbb3ef.pdf
    • https://static.usrfiles.com/ugd/55cc32_de42664f7b48423a966f2cf7f6bd1752.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_203e37c03f0e4010abd5977d3cc72053.pdf
    • https://static.usrfiles.com/ugd/822ecd_27db924346fc4596afc17698c90cc1eb.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_097107418a2d451a96af60da19a1b253.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/51601070556.pdf
    • https://cdn.shopify.com/s/files/1/0457/3698/4742/files/rosozamali.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/bexirewobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/kotosonawowefizozuso.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_off00007699.bin
8d3eb171373e9a6ce78e1cdf55ff84a3f20bd99b8cbda2475fb4615c13c5b54a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 5088 bytes
font_01_sfnt_off000087fb.bin
9b521c14341fb28232c511eb56f957a067a11573441f3e9b4b76887bd9df93c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FB 11124 bytes

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