Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ef2e550d896b39…

MALICIOUS

PDF

44.4 KB Created: 2020-07-30 13:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a061cfd4b48bddaa292c52498d606cd SHA-1: bb9d9a463ab643ddd69e894bcb446d35a1117da8 SHA-256: 26ef2e550d896b39c5afb1cd0127a6c610a4e46a2310d65e99a54631d3643db7
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to creating PDF books in Photoshop. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or SEO poisoning attack.

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.ru/pify?keyword=how+to+make+pdf+book+in+photoshop
    • http://files.refugefriends.org/uploads/1/3/1/4/131454106/zaget-noxepivi-fakimidod-ximitiwozoxi.pdf
    • http://files.trustinrealestate.com/uploads/1/3/1/4/131437685/4151154.pdf
    • http://files.mulyouth.org/uploads/1/3/2/8/132815220/mokevu.pdf
    • http://files.virtualpowerplants.ca/uploads/1/3/1/4/131453114/basubifetudisasigo.pdf
    • http://files.mulyouth.org
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/99655098078.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/kifex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/losimudegitidejudiku.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/39933196809.pdf
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/sikugubavesekegaxom.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/84117000416.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/goxorawepedifolago.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/33804122169.pdf
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/xikigupivajafobodatowa.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_off0000702a.bin
a83b9460f3f474e921f898ad959fc5bd1f58d2efb898f1a6853c392c137b23f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5200 bytes
font_01_sfnt_off000081b3.bin
042bb8935177ecabaf345a5724bb7063b4df5f24069ffe4277e59e4c162c3e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B3 10296 bytes

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