Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b2c7e67536fb3b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-05 10:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c00cca244c6460cdfd87eba363a8fc9 SHA-1: ec05b4eda129a7d3296e97d23475659a015e957a SHA-256: b6b2c7e67536fb3bd78c78bc6001b4b330ab8038b7fef190c83089ae5497d96d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=neuralgia+del+trigemino+etiologia+pdf. The document body, though heavily obfuscated, contains references to 'Neuralgia del trigemino etiologia pdf' and 'wkhtmltopdf', suggesting a lure document. The presence of a large number of external PDF links points towards a link farm strategy, likely for SEO poisoning or to distribute further malicious content.

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=neuralgia+del+trigemino+etiologia+pdf
    • http://ruvezixot.sangamoncountyswcd.com/uploads/1/3/1/6/131607062/7037984.pdf
    • http://files.spencerhdesign.com/uploads/1/3/0/8/130874554/gegibunakib.pdf
    • http://files.grettaharleymusic.com/uploads/1/3/1/4/131437380/vogowujelizo.pdf
    • http://files.georgiavinegar.com/uploads/1/3/0/7/130739678/xazuxomowiv_mokiki_famoginereli_kivapuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/wefowogulixebugikuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/download_biblia_takatifu_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/detalar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/xenudajafevudadevawowad.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6327/files/17885258689.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/52076956973.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/banorurubosube.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/81528944776.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/58245743654.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/viwin.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/jedozeletovotoxujogur.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_off0000669a.bin
bd0a71bc522f78c4e51989504077a829b9197c6aae26b487d27ea80cba3f05cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 5152 bytes
font_01_sfnt_off0000780e.bin
4248eb8b0a05f222001ac28fc0c807c609e7b869592a88637a50a8d7d3168f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 9812 bytes

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