Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce7b826eb66f764…

MALICIOUS

PDF

60.0 KB Created: 2020-08-23 02:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02966ba0b52b57a72af90e43efca6ab2 SHA-1: 05fa6dd7bcc001edd55143e65e154f3b938b9b08 SHA-256: 4ce7b826eb66f764b856d67fa062729cda11ad83c0a5fbf070ec65a47d46b17d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=business+management+personal+statement+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a lure to trick users into clicking malicious links. 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.cc/pify?keyword=business+management+personal+statement+pdf
    • http://durew.austinhouseinn.com/uploads/1/3/1/3/131384635/vuwavotapavoxaw_xawalumejofoti_fiveb_dujunilenape.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/mamikolefesox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/noguva.pdf
    • https://cdn.shopify.com/s/files/1/0434/6173/8662/files/appetites_bourdain.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/guponawaresajur.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/call_of_duty_1._0_8.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/pathfinder_familiar_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/kerur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/kakudejukafikunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1416/files/iifa_awards_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/bmw_328i_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5516/7126/files/14898098469.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/12673114540.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009fbf.bin
f5eb8fe3b82e23a661e7cf3d71fd05f44c9764d4723dc63a9d7621976440eb15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBF 5292 bytes
font_01_sfnt_off0000b197.bin
766c6ce6f101b0154f1848fbd202510159a8dad58accb3fa4c596fec01c5d2cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB197 10436 bytes
font_02_sfnt_off0000d531.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 4324 bytes

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