Malicious PDF — malware analysis report

Static analysis result for SHA-256 36343c2582c2256b…

MALICIOUS

PDF

32.5 KB Created: 2020-08-17 03:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeb1c0bd1477c7849f1443655d8daa67 SHA-1: bf8427e7986176e3079531cb4584815cc7ea8f12 SHA-256: 36343c2582c2256bb363f0a087adf0392016a35651666c56ff8eab3b59986c38
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, pointing to 'https://ttraff.cc/pify?keyword=half+life+decay+graph+worksheet'. This URL is likely used to redirect users to a malicious site for further exploitation or phishing. The document body, though heavily obfuscated, contains the same URL and a list of other URLs, many hosted on Shopify, suggesting a link farm or distribution mechanism. The presence of numerous embedded URLs and the ML classifier's high confidence score further support the malicious nature of this document.

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=half+life+decay+graph+worksheet
    • http://files.twinriverwholesale.com/uploads/1/3/1/3/131383665/71f1b14fdc76.pdf
    • http://nemaviwet.rareformcarting.com/uploads/1/3/1/1/131164462/94457d53c8.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/25155951986.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/wupulixosiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/45072490945.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/7926390773.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/imdb_parents_guide_hell_or_high_water.pdf
    • https://cdn.shopify.com/s/files/1/0440/5461/0070/files/antibiotico_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/empirical_approach_to_political_theory.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/simple_receipt_template_doc.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/pdf_to_word_software_for_windows_10.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_off00004132.bin
28a68b639d056644e6abc0ae65c1998d558552b31ade470f8604e2ffb0cfc887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4132 5636 bytes
font_01_sfnt_off0000546a.bin
7b7c4e5ed96a951787fb4fb10762226de64e0ef7fa8c564abc2767758d7e8a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546A 9288 bytes

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