Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dca363131a9467…

MALICIOUS

PDF

35.5 KB Created: 2020-08-04 02:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6695adc86d6031f355ab5ad3d964d5bf SHA-1: 306a0f494547f344696d2a4d2edbe0948c158bce SHA-256: e1dca363131a9467c6e3b08f6b69500c4155f645250cd69a062d03537838f8d2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'practice tests' and a URL that appears to be part of a link farm designed for SEO manipulation. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.ru/pify?keyword=advanced+trainer+six+practice+tests+with+answers+pdf+2020
    • http://files.thunderroadrunning.com/uploads/1/3/1/0/131070979/9155614.pdf
    • http://files.aliahjan.co.nz/uploads/1/3/1/4/131453436/7a766.pdf
    • http://files.mattarelloaway.com/uploads/1/3/0/7/130739020/jexepavugeg_basejik_retetapi.pdf
    • http://files.paletteandpaper.com/uploads/1/3/1/6/131637125/jopip.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/kabopok.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/92971796312.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/vusatidasudagoxokudumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/rewezagijux.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/relimotefutelub.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/far_out_ride.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/tiny_smiley_face.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/24372002534.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/57656783666.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/bomapinekezakigugutida.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_off00004819.bin
aff8856d521cf0985656fcb9084e7a216dea2a86d0a3056ad9d91a658274e293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4819 5692 bytes
font_01_sfnt_off00005b92.bin
07500a56b3ce0e141b5a5f8573c07ccf6d21cdf33186b9b126473ab2806a84b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B92 10376 bytes

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