Malicious PDF — malware analysis report

Static analysis result for SHA-256 866dee9e7a2774e1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-25 14:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4edb0c5b10c395d84d971b9b4efe6fc SHA-1: d58cf60efe6b404c86026079da153913bab416df SHA-256: 866dee9e7a2774e15acd338917dd500a60e8b223e2d265fb77cc973e93cf0f54
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body contains garbled text but also includes the URL and keywords like 'Fortnite newsela answers', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse. 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=fortnite+newsela+answers
    • http://pitiro.ngdancers.com/uploads/1/3/1/4/131413418/zuvufufidadazom.pdf
    • http://files.hillviewchristian.org/uploads/1/3/0/7/130776291/matenuxadede.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/dimulonakobudakelotigum.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/19836371044.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/48617426191.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/nomenclatura_de_acidos_inorganicos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/sabejesawoxemapuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/toefl_practice_test_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/mergers_and_acquisitions_definition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/11301363621.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/putolunibimewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2102/files/97477522323.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/27876908545.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_off000062cf.bin
03121ba8e7ba0b224df71f1994e5af8ae8ff2558d53717085b64711a063b0f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 4724 bytes
font_01_sfnt_off000072fd.bin
94d9a709aca4e957b7bfc4ba1b3aca93e0abed6a5c8dfed7d2bba87aa1ca74ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 10088 bytes

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