Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b7ddf67ad2efae…

MALICIOUS

PDF

39.3 KB Created: 2020-08-24 19:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 037ffbcdb55cd257949e024eb673c73b SHA-1: 9447fa394d960012e1f3e1334cf47de80f594a7f SHA-256: 57b7ddf67ad2efae99eb0f2acfa5375fe3e52ca69dfcbcd3ee2a37afa698342b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, with the primary redirector pointing to 'https://ttraff.ru/pify?keyword=booklet+template+powerpoint'. This suggests a phishing or redirection campaign aiming to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=booklet+template+powerpoint
    • http://xetajuk.anneboring.com/uploads/1/3/0/8/130813747/8491483.pdf
    • http://files.curation250.com/uploads/1/3/1/6/131607066/nebodeneti.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/kepupezuvilef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/92194525289.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/rivopijevotenilapigexige.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/59545619487.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/nudegexogun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/22235634373.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/cincuenta_sombras_mas_oscuras.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/99450466573.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/apple_preview_add_text_to.pdf
    • https://cdn.shopify.com/s/files/1/0435/0899/0116/files/vopalo.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_off00005e1c.bin
92afe03df1fe7e443352bd7e20b7e0e3ac22ef1f1216904f7b1d6e5ef2d836cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1C 4992 bytes
font_01_sfnt_off00006f10.bin
702786b2823fb703e5bacd0cbc0acab11d16c2d2237f6e4c2c6bd7052735c994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 9832 bytes

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