Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c29f331f433163…

MALICIOUS

PDF

64.3 KB Created: 2020-09-12 03:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b890678ed7fdfb250197b94bebfbc8 SHA-1: f64ca9e56b32c5e0470f879c4f96618fc4aa9008 SHA-256: 43c29f331f433163513d30dbb31f5ca45d85a39d0ce823b9e0b551738aaf5f75
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=katakana+practise+sheets' and other PDF links, suggesting a lure to download further malicious content. The presence of a visual download button heuristic further supports this attack pattern. The file is identified as a PDF, and the heuristics indicate it's designed to redirect users to malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=katakana+practise+sheets
    • http://files.thaifoodtogoonline.com/uploads/1/3/1/3/131382092/945068fe3.pdf
    • http://tudelid.nrmg.ca/uploads/1/3/1/3/131379015/teguvejijujeza.pdf
    • http://judup.carolinegoldbergigra.com/uploads/1/3/1/3/131381204/6b578e5.pdf
    • http://xifof.newyork-homeinspections.com/uploads/1/3/1/6/131606490/4203652.pdf
    • http://files.stacysimmons.com/uploads/1/3/1/8/131857758/2436211.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/rewuxidugebafow.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/85115484718.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/54927859611.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/92_ford_f250.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/gowetepewaxetox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/61435656886.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/rig_veda_odia.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/82042823501.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/android_phones_that_support_wireless_charging.pdf
    • https://static.usrfiles.com/ugd/c5d40f_2f1672f3f8f244d99fb59b574e43b242.pdf
    • https://static.usrfiles.com/ugd/7baf93_ea7080d9f7104f8e80ae52934ea2a868.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091b0.bin
65e502ee595bf9e7ab8520cd41052080fd78678a174ed43756e4413959bc2371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B0 9840 bytes
font_01_sfnt_off0000b228.bin
7e749da4fe79d6d3af34b75bd9ff4fd83639e5597bbd8d4955be02002c342c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB228 4700 bytes
font_02_sfnt_off0000c204.bin
b246182ae527067c9475eafc5c64749a6f4edafb33bc6460df35b0d12681be1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC204 10348 bytes
font_03_sfnt_off0000e549.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 4324 bytes

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