Malicious PDF — malware analysis report

Static analysis result for SHA-256 29eeea30ae2ef27c…

MALICIOUS

PDF

50.0 KB Created: 2020-08-21 03:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fbd834b74bd682c3156e16f3c4cd3d5 SHA-1: ef2ba2eb86ef854d7f09603448b7a6807be0827a SHA-256: 29eeea30ae2ef27c9d5bcd2859d73cae93b072a845b57fed26c96ced7c16794c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a PDF related to vocabulary exercises, likely a lure. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to potentially harmful sites.

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=vocabulary+exercises+for+adults+pdf
    • http://files.xuwang.us/uploads/1/3/0/8/130814492/gosetowusamo.pdf
    • http://files.barrettfineartadvisory.com/uploads/1/3/0/9/130969855/5337525.pdf
    • http://sajizov.shadowsdepressionsupportgroup.co.uk/uploads/1/3/0/8/130874063/ranav-lufirovirutaw-vowetena.pdf
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/how_to_make_veinminer_work_on_everything.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/personal_branding_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/blender_3d_printing_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/xekisesugosuguzilazib.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/statistical_quality_control_book_by_mahajan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/wonozotowesevakipemenagul.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/ionic_bonding_worksheet_doc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/bafepajadutotowot.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/32041788174.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/causes_of_burglary.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_off00007b77.bin
24cd117396adc7e8a361fb6e2a5d11fbef9394ad25c77e9ff2873ea65d0b20d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 5424 bytes
font_01_sfnt_off00008df6.bin
f4937ad0c83ed68f556d61a529d67ef60ae1335ee1f2a4fb1fd365db5532fdbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF6 14400 bytes

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