Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b96d78ff7ae8832…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 07:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ceaffff773d002a222811b2211303a SHA-1: 73e24462f19f4ba5b70f5cafda731630b2034019 SHA-256: 4b96d78ff7ae88328e7ecac682b8a9adc42ed7b24220e101db3fb46a1f71b7f2
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to 'Genetics from genes to genomes fifth edition pdf' and numerous embedded URLs, many pointing to Shopify-hosted PDFs. This suggests a link farm or SEO poisoning tactic to distribute malware or conduct phishing. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=genetics+from+genes+to+genomes+fifth+edition+pdf
    • http://files.ohiothunderbasketball.com/uploads/1/3/1/3/131381204/gakovabivifazirivo.pdf
    • http://files.mrdougcampbell.com/uploads/1/3/0/8/130814644/jasosazelobi.pdf
    • http://files.tiafinnauthor.com/uploads/1/3/1/4/131438439/2b07d.pdf
    • http://begegor.itisallaboutlife.eu/uploads/1/3/1/1/131164239/judatato.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/riwimadumafaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8248/9762/files/suvapodawerakoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/kejotijinodirez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/15569690057.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/jubujuxovonil.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/hearthstone_arena_class_tier.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/84967199624.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/21478130083.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/9917388733.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/sugar_content_of_foods.pdf
    • https://cdn.shopify.com/s/files/1/0435/5689/6920/files/68992768648.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_off0000607a.bin
aa929930e328fd299e6450f7cafbd631213b2ebacf49a4eebcad08656f287656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 5356 bytes
font_01_sfnt_off00007291.bin
1790d6202dd3acc52773ab0e49a922e44ead7bba3078802e6ba54dbf95634808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 9928 bytes

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