Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9f1348934f1726…

MALICIOUS

PDF

48.1 KB Created: 2020-08-13 21:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a520bd5c493ef64e81ef2dcbcc69eba SHA-1: a165299ec9195762aa999ad17c2f332a81bf4096 SHA-256: ec9f1348934f1726fc15a3c63e364a7dda9d778e6134bd8f85fbee08afd62703
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of an SEO link farm. The embedded URL `https://ttraff.ru/pify?keyword=mataji+aarti+video` is identified as a malicious redirector. The document body contains garbled text along with several URLs, further supporting the link farm and redirection attack pattern. No scripts were extracted from this sample.

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=mataji+aarti+video
    • http://files.seliasomething.com/uploads/1/3/0/7/130775108/526cac5e5c8.pdf
    • http://files.almostsponsored.com/uploads/1/3/1/6/131637043/7163544.pdf
    • http://files.northvalleyrideclub.com/uploads/1/3/0/7/130775228/rizetepi.pdf
    • http://files.fultonjazzfest.com/uploads/1/3/1/3/131379639/68cedf38f34ea3a.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/hindu_baby_boy_names_starting_with_p.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/eenadu_epaper_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/wajozipok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/principios_de_quimica_atkins_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/hedging_language.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/dell_latitude_d620_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/memuposupevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/lipid_profile_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1567/files/38211014150.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000588d.bin
795ef97c1583507b3518498c7afdfff03b45a1c6e4be8163a1f4f192fc18c401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588D 4748 bytes
font_01_sfnt_off000068d2.bin
5061dbf52a4891793739eee95d036e10abd8cbffbe1f4c87cb7b04d30b06b050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D2 10036 bytes
font_02_sfnt_off00008b36.bin
1df8748d27216e13ecb1b385af2714a8a5e0f3136441801a500ba73efeb5b648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B36 13044 bytes

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