Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7c17d87d89ec8b…

MALICIOUS

PDF

44.6 KB Created: 2020-09-26 15:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9dac1053a64f5996c08db35f98d7a98 SHA-1: 231aa26cb0bc7c0566dc54785ea8e4afed3f81df SHA-256: 4d7c17d87d89ec8b81fe39e7bab432bd2be24edc41d8c914481dc682157f4fb6
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to potentially malicious redirectors, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL identified is https://ttraff.cc/wb?keyword=freestanding%20fireplace%20mantel. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other links, suggesting a lure to external content.

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=freestanding%20fireplace%20mantel
    • http://nadena.crystalsandmoregalore.com.au/uploads/1/3/0/9/130969744/7294257.pdf
    • http://miwajutu.kylehughesaudio.com/uploads/1/3/2/3/132303124/xikemi_limuvaf_givememewewe_vuzijimedi.pdf
    • http://xenetig.meyersmagneticjewelry.com/uploads/1/3/0/7/130739061/zumeniratinotezamuf.pdf
    • http://xemixese.mutouchfootball.com/uploads/1/3/1/6/131606162/kabedepo_rufebusa_zakomut_pukexuxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3503/9656/files/how_to_use_open_terrain_generator.pdf
    • https://cdn.shopify.com/s/files/1/0435/5755/2277/files/33329552164.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/limumovarone.pdf
    • https://cdn.shopify.com/s/files/1/0440/4848/2454/files/wodopomojago.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/surusukobabozas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/pubufosunew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/80365879521.pdf
    • https://bb96af9a-d956-49da-9b6c-40c217f29a9d.filesusr.com/ugd/b98abb_1066e50a08084e28b934ef36d8476e03.pdf?index=true
    • https://8521ed86-09db-4f51-8ee3-e685284811fc.filesusr.com/ugd/7baf93_9b4cf54db8aa496c9033834bbea53adf.pdf?index=true
    • https://1c6b783c-5de6-427f-8052-e8669cb24550.filesusr.com/ugd/cbdbb6_e3e6003339fc4932940b78cff1fca0e2.pdf?index=true
    • https://8d9534e1-527c-4fcb-83eb-62675c2a4ae8.filesusr.com/ugd/8c0e65_e8938b1af6e6453dba05fe08eca1d53b.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006429.bin
a1e808fd1fe28e2ff1ba20f6f5f49a2d8ddae6a5d365b5602883e38904718c71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5108 bytes
font_01_sfnt_off0000756b.bin
79a770c9698e77333fb9bfe4007cb61032f72d47150a8715bb83b3030a954872
pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 9984 bytes
font_02_sfnt_off00009781.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9781 4324 bytes