Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd685898e80e9b38…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 14:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 834a7e862865501dbca765629b6d19e2 SHA-1: b0cc8dbef32413759739cb2956176efc0ee31be1 SHA-256: fd685898e80e9b3824f80936dd4f2060d7df8df81f024ec65cc5bf8b23ec5c46
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'analog clock worksheets grade 5' and the malicious URL 'https://ttraff.com/pify?keyword=analog+clock+worksheets+grade+5'. This suggests a social engineering tactic to trick users into clicking the link, likely leading to a malicious download or phishing page. The presence of a link farm further supports the malicious intent.

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/pify?keyword=analog+clock+worksheets+grade+5
    • http://files.tattnallarchives.org/uploads/1/3/1/4/131454345/4271624.pdf
    • http://files.hillneuroslp.com/uploads/1/3/1/4/131437676/5981561.pdf
    • http://files.sandalsdoggiestuff.com/uploads/1/3/1/6/131637839/1aa5f21234eb.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/53788135860.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3127/files/acrobat_reader_dc_editor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/50792588763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/trends_in_higher_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/tasaxevifajubaleropuga.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/padozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/97980218316.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/tedomoxoke.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/84839728452.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/bnficiaire_effectif_remplissable.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/ratumijozaxa.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_off00006384.bin
2af19e9c0418e26e9e79d7855e8d753718550cfaa0898f8db4b8e0613d9e94b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6384 5468 bytes
font_01_sfnt_off00007626.bin
ad346538fc130bddf6967fb9d4460ef4f5469b6a86660d56d1eb95f4a44c56cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7626 10320 bytes

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