Malicious PDF — malware analysis report

Static analysis result for SHA-256 afde0c81464899e3…

MALICIOUS

PDF

40.1 KB Created: 2020-08-03 22:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97e57b02865683d3526803d520217b74 SHA-1: 416d2ac78cd2a62828baf6527403963e7f9fc06c SHA-256: afde0c81464899e3dde6a6e6d5f4a909d43704bac22ab84df4069571c754cf62
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, directing users to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=humphreys+introduction+to+lie+algebras+and+representation+theory+pdf. This technique is often used to distribute malware or phish for credentials by leading users to compromised or malicious websites. The ML classifier strongly supports the malicious nature of this PDF.

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=humphreys+introduction+to+lie+algebras+and+representation+theory+pdf
    • http://files.xrhodesfilms.co.uk/uploads/1/3/2/7/132712214/lodajanusud.pdf
    • http://files.peterborthwick.com/uploads/1/3/2/6/132695620/fcc4d.pdf
    • http://files.delilahfayeart.com/uploads/1/3/1/6/131607522/rakamobexavan-bepofabadexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/55621420199.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/zetadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/23363360392.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/givazupebirufejisolop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/katinalodoxukunuwudis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/82044853771.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/woputapejasazewimal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/82881957591.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/25347685027.pdf
    • https://cdn.shopify.com/s/files/1/0432/5012/2916/files/berufitinarewofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/76031685470.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_off00005c45.bin
004709f34871b221cc3a7521888349bc6670bc48bed1727b05da8b2b984b0292		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 5772 bytes
font_01_sfnt_off00006fc7.bin
5e7f05b8f9642ca2dd4bff420dc389cbd83639c8b42e23ed1e7c2b80d993e2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC7 10312 bytes

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