Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74c4a1e75a586bb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-16 20:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5253dcf84de30c5d68a01768d7b87ea SHA-1: 836265f63ee81832bc6f48a2d11b160aeeecfa15 SHA-256: e74c4a1e75a586bbced2702b75acf2969ae97e29891df57d6a0a35d41280450a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, forming a link farm. One prominent URL, 'https://ttraff.ru/pify?keyword=soundcloud+go+apk+mod', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to download potentially malicious content or visit phishing sites. 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=soundcloud+go+apk+mod
    • http://files.campverdecommunitychurch.org/uploads/1/3/1/3/131383444/xulifo-lanivevesititaf-gogidoxe.pdf
    • http://fekerep.workingwonders4downs.com/uploads/1/3/0/8/130814328/doxedudebokesi.pdf
    • http://files.nyccovidrelief.com/uploads/1/3/1/6/131636907/9504198.pdf
    • http://xidagis.caribbeanmemoryproject.com/uploads/1/3/1/3/131383544/a873dd8.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/jewitep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5881/files/71897928430.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/70143102615.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/senezitelojanoxurexewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/soruma.pdf
    • https://cdn.shopify.com/s/files/1/0435/4165/9797/files/catecismo_romano_concilio_de_trento.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/l_analyse_de_la_boite_a_merveille.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/12760869494.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_off00005d76.bin
849975a5ff7fdc200d7d1fcc7354760faff82cc41b30167604a442dc9ff2781c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 5288 bytes
font_01_sfnt_off00006f60.bin
dcee7329c6421ab0092c423250874b04e93cb75aa06e02d96cc4a99f184365c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F60 11064 bytes

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