Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cca212faa430d3…

MALICIOUS

PDF

57.2 KB Created: 2020-07-17 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cd9b69daf41b42fd24b4680ab584a8a SHA-1: 5b59d157f34513a83968fc12cfefddb9020d6cb5 SHA-256: 34cca212faa430d355817a07f2826cdd40f2e8e0ccceceee6e367a08b32c6987
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a 'PDF_MALICIOUS_REDIRECTOR_LINK' pointing to 'https://ttraff.cc/wb?keyword=banting%20meals%20pdf'. Another critical heuristic, 'PDF_SEO_LINK_FARM', indicates a mass of external PDF links, with 'http://files.lifeworthmentor.com/uploads/1/3/1/0/131071063/bumalufelax_nonuwuzopugexo_vufilakuvololub_bajamojosikug.pdf' being the first identified. The ML classifier also flagged this PDF with high confidence. The document body appears to be largely obfuscated or contains minimal readable text related to the attack.

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.cc/wb?keyword=banting%20meals%20pdf
    • http://files.lifeworthmentor.com/uploads/1/3/1/0/131071063/bumalufelax_nonuwuzopugexo_vufilakuvololub_bajamojosikug.pdf
    • http://files.starsclassesonline.com/uploads/1/3/1/3/131398139/rurasizukig_paxalikugaxij_fevozemez.pdf
    • http://files.roddybridges.com/uploads/1/3/1/4/131437535/6160160.pdf
    • http://files.contetimothyportfolio.com/uploads/1/3/2/6/132681207/7db34824ddd7.pdf
    • http://files.dbedwardsjr.com/uploads/1/3/1/3/131384374/fedel.pdf
    • http://files.centrepointecincinnati.com/uploads/1/3/1/4/131406413/e08b8.pdf
    • http://files.scarlethistoricalreview.org/uploads/1/3/1/6/131637163/1087964.pdf
    • http://files.iwfmasters.org/uploads/1/3/0/7/130776069/vunedikimulu.pdf
    • http://files.stogasmith.com/uploads/1/3/0/7/130776250/3085068.pdf
    • https://ronezas.files.wordpress.com/2020/07/sukigolo.pdf
    • https://doledanemuku871212074.files.wordpress.com/2020/06/xopuweluziwumagejugufubo.pdf
    • https://xurabiguju.files.wordpress.com/2020/06/lutopevagixuxinukara.pdf
    • https://gatogika.files.wordpress.com/2020/07/toxusexosimavujuloze.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/wadufemiwapapavani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6735074847.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/femanitenora.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/lolazekobonimajiza.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/bejuzunogejuveno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/14576710922.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/pikuxilamutumijenex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/90191366185.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_off00009804.bin
113be08393ab50a57fcb762dc832843323f748cc9e46daafbf3d0055550efcc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9804 4992 bytes
font_01_sfnt_off0000a8e4.bin
1e5ba7ea7a71f30c4a5d18e93bafdef3f76e08644ad70e22fcd18b989c06933c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E4 14968 bytes

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