Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b840e66aa675c84…

MALICIOUS

PDF

31.5 KB Created: 2020-08-19 03:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba872d69fd2b916cd80616d4730b8960 SHA-1: d4ec141441bd1e85cfb2bd1c1a3848137b7d844f SHA-256: 7b840e66aa675c8431a64786cdb7a3dcf43e3f38ee7a81a308b2bfa385c5a778
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or lure users through deceptive content. The ML classifier also strongly indicated maliciousness.

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=anime+weathering+with+you+hd
    • http://baduza.fairwindsvilla.com/uploads/1/3/2/7/132740649/4476782.pdf
    • https://cdn.shopify.com/s/files/1/0440/8855/7718/files/clinical_exercise_physiology_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/a_user_s_guide_to_the_brain_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/wituxoxova.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/97603404805.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/14946435154.pdf
    • https://cdn.shopify.com/s/files/1/0436/0830/9923/files/nixaselokuviva.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/kemakofofebur.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/nolevonoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/latest_movies_sites_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0454/0537/2584/files/lightning_arrester_catalogue.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_off0000408f.bin
8a38f02fa1186eda01f342b35fa74a6eea837bffbc36b9df8f5d4640583070a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x408F 5212 bytes
font_01_sfnt_off00005228.bin
40916af57264d20e21ccad8eadb31b4406ef7b37dd9d563c45e89fb0b2cb1376		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5228 9260 bytes

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