Malicious PDF — malware analysis report

Static analysis result for SHA-256 349bd491f163a94f…

MALICIOUS

PDF

46.6 KB Created: 2020-09-06 08:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b0a9d27e512211dd7ec0f9691f938f SHA-1: e3b7837534b7816818bc53391ebfb323bf23b44a SHA-256: 349bd491f163a94f59d12d8c94defdef4bc9abdee8f6eb59fff124b41a583838
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.me, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and keywords related to 'Android studio requirements hardware', suggesting a lure to a fake download or information page. The presence of a large number of external links, many pointing to Shopify, indicates a link farm designed to improve search engine ranking for malicious 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.me/wix?keyword=android+studio+requisitos+hardware
    • https://static.usrfiles.com/ugd/b8c837_b61eece07ac84e12a16fc3fc155c8555.pdf
    • https://static.usrfiles.com/ugd/a382ee_d8800122f2634771815003088279eec9.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_8b300d8ed8c144f194d650565d2f7531.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/wezibonizazarujikarujig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/63470792213.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/fotisavijasevezivulef.pdf
    • https://static.usrfiles.com/ugd/0dd040_682b447a59ea41e281876b4591349b44.pdf
    • https://static.usrfiles.com/ugd/8bc2a6_9fb07e414bd4412cbad376512fa8ebcc.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_e6a6489b55e24a34b43ae3df14d832e2.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/valentino_rossi_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/amazing_run_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/can_adobe_acrobat_x_pro_convert_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8938/files/contingent_liabilities_shown_in_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2975/files/31670848056.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_off00007864.bin
2d130fc00209448bb30ffb776a91cbf5968fa76e6597f45c2d2a1d0fc21e37e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7864 5088 bytes
font_01_sfnt_off000089b3.bin
12fe51b2e7ae71eb1896d515dbc7dba25d929466c7ece5bc93e203171bac38eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B3 10512 bytes

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