Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad63f154140e212…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 12:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 581f64b615dbf1cac715981fdac06716 SHA-1: bc9bfbfde08d6e0d073501cfc22a8f8c04aa8ccf SHA-256: 4ad63f154140e212e1c0e977081bc3bd091d05ed2e39ab3d087eddc48e5ccd0e
120 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, a common tactic for SEO poisoning and phishing campaigns. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=major+terrestrial+biomes+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute malicious content.

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=major+terrestrial+biomes+pdf
    • http://latek.bzzzybitez.com/uploads/1/3/1/4/131438379/04387b934c59.pdf
    • http://files.allsaintswichita.com/uploads/1/3/0/7/130740504/rimosuwaw_wawurapub_xezesudof.pdf
    • http://files.markochdance.com/uploads/1/3/1/4/131453086/15cf064d.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/45758899906.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/ayushman_bharat_yojana_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/lotosimiwunenigolumem.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/zofadomitoruwuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/bowof.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/83405885427.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/kikezibulezinuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/bunuxafewidakozugivanexov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/63218074027.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8874/files/81898739515.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_off00006db5.bin
598d4da44b71545a8c02565a01e80ce8cdde773ab8ff778f418452b6e5987571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB5 5408 bytes
font_01_sfnt_off0000800b.bin
e1f129ebd6aa05e220c60af856a73e4f02b25c638942a281e4068de180d05ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800B 10104 bytes

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