Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a25e5eb689f9eb…

MALICIOUS

PDF

58.6 KB Created: 2020-08-07 17:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0df98ef4e6fa1459578faaf6f4a8a32 SHA-1: 2efaf41dccea36589e0824b88e27b4070d3a4ada SHA-256: 48a25e5eb689f9eb40058017f1e0ed8380ca040e6dee72b464393c25a162f48f
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.ru/wb?keyword=common%20and%20proper%20nouns%20worksheet%20answer%20key%20grade%205'. The document body, though heavily obfuscated, appears to be a lure related to educational content. The presence of a malicious redirector suggests an attempt to lead the user to a further malicious resource, likely for credential harvesting or malware delivery.

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.ru/wb?keyword=common%20and%20proper%20nouns%20worksheet%20answer%20key%20grade%205
    • http://files.templebaptistchurchdq.com/uploads/1/3/2/6/132683070/6177677.pdf
    • http://files.carenharrisphotography.com/uploads/1/3/0/7/130739022/jokuju.pdf
    • http://files.viceroyautotrans.com/uploads/1/3/0/9/130969368/punepux_walubinasabe_nurupakovako_jodukilelajun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/54144455062.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/52075868801.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/tevowiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4366/files/lulojikifunotiwej.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/92719362623.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/18576000049.pdf
    • https://cdn.shopify.com/s/files/1/0440/8649/3349/files/free_21_day_keto_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/jack_lalanne_power_juicer_express_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/34556844772.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/fiselewimunanofapesone.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/80068445263.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/botelexoxaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/50261136479.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_off00008d15.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D15 2828 bytes
font_01_sfnt_off0000970f.bin
13c3aaed9a6bf5b418e6eccce01412bd59bfd5878840d4c96d8febfb53c25c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970F 5580 bytes
font_02_sfnt_off0000a9fa.bin
1401f94f89235ce0e2ed50b9f31c3df01d6bca594669d40da4b16c1b484dc846		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FA 10048 bytes
font_03_sfnt_off0000cc0e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0E 4324 bytes

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