Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2524b443d5ca18…

MALICIOUS

PDF

49.8 KB Created: 2020-08-09 05:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c321fd876f2f13b9fa2f392bb049e55 SHA-1: 3942fdbc1f5c9a23a78575fd8f8784b7383c02e3 SHA-256: dd2524b443d5ca189a8fe36b7a957d5497584132198d623ce90c269600311a44
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=simple+present+exercises+pdf+cambridge', suggesting a lure to disguise malicious activity. The presence of numerous Shopify-hosted PDF links indicates a likely SEO poisoning or link farm tactic to distribute the malicious payload.

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.com/pify?keyword=simple+present+exercises+pdf+cambridge
    • http://files.awakeningsprayer.org/uploads/1/3/0/7/130775441/supurojinonune.pdf
    • http://files.embodycarolina.com/uploads/1/3/1/8/131856539/b197fa4208b66.pdf
    • http://files.alyvero.com/uploads/1/3/0/7/130740011/2a0171.pdf
    • http://files.davidwhitneybuilding.com/uploads/1/3/0/7/130775429/6547895.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/birimuxevewaleruzodizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/golijedetujidapibufud.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/38892767293.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/37055433839.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/50887677645.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/rikudune.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/23385367578.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/49442358401.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/principles_of_biostatistics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7272/3875/files/bernard_cornwell_agincourt.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/negima_episode_1_eng_dub.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/que_es_un_analisis_literario.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_off0000831f.bin
982ea567e56d8433f41bdc6d0abdfd2446f3d59d17a567c2ce405ea390dc0af2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831F 5788 bytes
font_01_sfnt_off000096bc.bin
9f92d4c71c3d269349ea93e5a25ec2b8fdf410c38937cb213538c7c6b7782ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96BC 10472 bytes

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