Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de478c4c6ac6d54…

MALICIOUS

PDF

32.9 KB Created: 2020-08-19 22:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d876416d02d91fc48b2489312b7df96 SHA-1: 8ca4d5baf94f9852c816e6cb6f9b1532d41cc336 SHA-256: 4de478c4c6ac6d54f4867506abeb60079c006ab0416cdf11e380964f127e47ae
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'https://ttraff.ru/pify?keyword=chess+for+android+apkpure'. This indicates a phishing or malware distribution attempt, likely using SEO link farming techniques to obscure the malicious destination. The document body, though heavily obfuscated, contains the same malicious URL and other PDF links, reinforcing the lure.

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=chess+for+android+apkpure
    • http://files.mgbbsewing.com/uploads/1/3/0/9/130969704/eaa98185d4.pdf
    • http://borumonu.loveaffairwiththyself.com/uploads/1/3/0/7/130738971/97548bee.pdf
    • http://files.battlepark-now.com/uploads/1/3/1/8/131856232/4658980.pdf
    • http://files.tilthrestaurant.com/uploads/1/3/1/3/131380345/zokarinuka_musilaxojenixam_viwurekitututax.pdf
    • https://www.aartbik.com/android_manual.phpChess
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/jujajavava.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/dakokuvek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/18945651729.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5840/files/20_lectures_on_algorithmic_game_theory.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/9339194894.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/lotoxisuvanuvetanifid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/princesses_don_t_cry_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/wimexisuzupurufokoropipez.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/libro_cengel_transferencia_de_calor.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/livro_arquetipos_helio_couto.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_off000044e4.bin
5889382c180e6f694bad887d4b6c45377a81c1295dfd007f134653b29b9fcf41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44E4 5064 bytes
font_01_sfnt_off00005612.bin
09707b97c6f35f3af2b2df7d3818e16868d81d1fe317ae747eba523fee664bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5612 9628 bytes

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