Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c0f19a1ea6e7a2…

MALICIOUS

PDF

37.3 KB Created: 2020-08-26 17:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6fe5d0c913a0af53f26bb9d8acb73e8 SHA-1: e84fb4515b3bd44c177d101d1c8388bef6d92e56 SHA-256: 49c0f19a1ea6e7a2cb3e3d20ae6170bd75328ac7f162879b2a031b2a25ff862b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=el+esclavo+pdf+gratis'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=el+esclavo+pdf+gratis
    • http://files.shinechiro.com/uploads/1/3/0/9/130969680/675b682.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/87408865882.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/bavobevikuverojobaxofuxet.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/anova_precision_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1586/files/vobujuwameza.pdf
    • https://cdn.shopify.com/s/files/1/0437/2974/8117/files/togulasexoros.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/boxozup.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/sonubonifuparigovego.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/13740429658.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/secret_of_secrets_abdul_qadir_jilani.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6086/files/jederebawisofimabotika.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_off00004633.bin
ad498c4ad9bab7e135dc43228b11710a9677db14067f951708d7732d4050e97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4633 5020 bytes
font_01_sfnt_off00005761.bin
d19858e57f3661995c362347f7ed166046b9b21c07eb0004470b417bb4879eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5761 10316 bytes
font_02_sfnt_off0000790d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790D 4324 bytes

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